Do Underinflated Tires Kill Your Fuel Economy? Let's Find Out!

Do Underinflated Tires Kill Your Fuel Economy? Let's Find Out! | Ep. 1

Рет қаралды 141,966

Күн бұрын

TFL runs on Sinclair fuel and so should you. Download the Sinclair DINOPAY app and start saving as much as $0.10 or more per gallon on your next fill-up. ( www.sinclairoil.com/customers )
( www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! It's a question that's often asked: How much will deflated tires hurt your MPG. Is the difference even noticeable? Andre finds out in this real-world test!
DISCLAIMER: Regardless of the results, we obviously don't recommend deflating your tires when driving on pavement for your safety and that of other motorists. We conducted this test strictly to see how fuel economy would be affected if your tires were at a far lower than the manufacturer-recommended PSI rating.
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#ram1500 #tiretest #mpgloop

Пікірлер: 704

@davidblalock9945 Жыл бұрын

Its not that it will cost you 9 dollars more to fill up, but that you will have to fill up 46.8 miles sooner.

@boomstickpd79 Жыл бұрын

I was laughing when he said that. Glad you made this comment. It doesn’t matter the MPG. Still costs the same to fill up😂

@LVLifeguard Жыл бұрын

Yeah, their math is generally a little fuzzy... to the point it's not true/borderline lying, ESPECIALLY when it comes to their EV coverage. They estimate/round and jump to conclusions that aren't true, the equivalent here would be saying 22.6 MPG is closer to 25 MPG, and 20.8 MPG is closer to 20 MPG, so your getting approximately 5 MPG LESS with underinflated tires! 🙄🙄 Uhh... no...

@shitloveaduck Жыл бұрын

@@LVLifeguard - You are exaggerating yourself!! 😂😂😂. Forget your biases and learn not to hammer on someone in a man where what you are saying may be worse!! Too funny!!

@Jonsellscoolstuff Жыл бұрын

Don’t forget the irregular tire wear

@kingodoom2 Жыл бұрын

I think what Andre should have said is "It will cost you 10% more to go the same distance." Cost of fill up is based on fuel price and fuel capacity. Neither changed in this test. Only the maximum distance per tank is effected like you stated. 10% less distance is the result which will cost you over time.

@Justaeuropeanman Жыл бұрын

You guys should do over inflated tires also

@GrantOakes Жыл бұрын

Mileage will probably go up due to lower rolling resistance BUT, the tires will wear out faster on the crown of the tread.

@omardevonlittle3817 Жыл бұрын

Happy you guys are having so much success with the "Stubby" series. Here for it!

@MrHasie Жыл бұрын

I thought it was decided shortbread 😬

@JamesMcLaren1000 Жыл бұрын

That was interesting. I thought it would have made a bigger difference than 10%. Under inflated tires are costing efficiency for sure, but also they’d wear out a lot faster too.

@markmccarty9793 Жыл бұрын

I thak you for your comment! I know not to waste the extra minutes of my like wating til the end!! But, the 6 cylinder engine vs a mowr powerful engine?

@bigric5100 Жыл бұрын

I love the series and reviews of basic trucks. Sure the Hummer is awesome to look at but there's zero chance of me ever buying one. This series will inform my next truck purchase

@fscottgray9784 Жыл бұрын

It would be interesting to have a temperature guage to see what the tire heat was after each run. It would be much warmer on the under inflated tires and that would lead to increased tread wear.

@DanielGarcia-zz9eg Жыл бұрын

I believe this was just a test since most ppl will not air up in winter season. "How much is it costing you in the winter " with TPMS on most vehicles, I say 40% of drivers will freak out and hit up discount tire for a free air check or their local dealership to avoid being outside freezing. Ii

@TheAnnoyingBoss Жыл бұрын

I think they should stick a couple layers of bed sheets or something over the bed and see if it improves fuel economy

@DanielGarcia-zz9eg Жыл бұрын

@@TheAnnoyingBoss I believe the spoiler on the tailgate is supposed to help improve. that little plastic spoiler on the other hand, I just brought a bed cover, and I didn't see no improvement on the MPG for RAM 1500 V8 the only way to gain more MPG is to drive slower. 55mph to 60mph. if you don't like going that slow, 65mph will do it with no cruise control i just did 55mph on the 22 MDX and i was getting 32mpg for 115 miles. turn around and did 70mph it come down to 19mpg. gotta drive slower for higher MPG, same goes for pulling trailers

@killercan10 Жыл бұрын

GM's TPM sensors in their products (and I'm sure other brands) can read temperatures and pressures. In the Camaro and Corvette for example the DIC can show tire temperature in "cold", "normal", "hot", etc. You can see this with GM's latest TPM diagnostic tool as well on all their sensors (pressure and temperature). If you read the data in the vehicle with GM GDS2 diagnostics you can pull the actual temperature data that it is referencing. So with a good OBD Scanner that can read the TPM data, and as long as it shows pressure AND temperature then you could read that data.

@nukedathlonman Жыл бұрын

@FScott Gray And those higher temps is the leading cause of tire blow outs (more so then over inflated tires).

@michaelcrouch4248 Жыл бұрын

Great test! Actually, before watching this I had actually checked my tires yesterday on all 4 of our vehicles- 2 Jeeps, a sequoia, and a crew cab Silverado, and all had gone down about 8lbs in the last 2 months because of the significant temperature drop we have seen in North Mississippi already. Nice to know the stats now 👍

@Jtwizzle Жыл бұрын

1 psi per 10 degrees F drop in temp. Also maybe a tiny bit of loss over time.

@kevinstenger4334 Жыл бұрын

How about a comparison between running at the maximum inflation pressure on the tire versus the recommended pressure on the vehicle?

@tbone9405 Жыл бұрын

Thank you for a real world test of something I have always wondered about!

@bernhardjordan9200 Жыл бұрын

Should have done over inflated as well

@Followthelemming Жыл бұрын

I wish you added 1 more loop with overinflated tires, say 55-60psi. Thanks for the video!

@LTHero. Жыл бұрын

Probably not a good idea if it exceeds recommended psi. The tire can blow up.

@azroadposer Жыл бұрын

Okay as long as not to exceed the max pressure written on the sidewall of the tire. I use that as my max and the door as min.

@vr4787 Жыл бұрын

Deflating the tire increases rolling resistance, so it takes more fuel to turn to overcome that, resulting in less mpg. Great content!

@dalejones4322 Жыл бұрын

Glad to see the mpg improved since they brought it home. Great video Andre

@alfontana6242 Жыл бұрын

Not only will you get more MPG's with properly inflated tires you will also get a longer tread life out of your tires as well, a definite win win.

@timwoody3835 Жыл бұрын

A more important consideration when running on underinflated tires is safety. The tires will get hotter which can lead to things like tread separation or sidewall failure. This leaves the possibility of being stranded or having an accident. The best thing, check your tire pressure regularly. You will save money and be safer.

@-Jethro- Жыл бұрын

Exactly right. This was the cause of the Ford Explorer / Firestone tire failures and subsequent rollovers back in the late 1990’s. Ford recommended only 26 psi at the time.

@brandonmoore1930 Жыл бұрын

Hahahaha

@brandonmoore1930 Жыл бұрын

@TheMrDudiness hahaha good one

@streetspeed9166 Жыл бұрын

As long as the load range is higher than the factory tire that was on the vehicle I don’t see a problem my 98 5.9 1/2t with a slightly oversized tire at a 265/75r16 vs 245/75r16 I get about epa level I run about 25psi in California these tires are load range d I have 37’s and a leveling kit that will be installed so I think it’ll make a sizable difference in efficiency and mileage

@lcee6592 Жыл бұрын

Nice experiment! I always check my tires every two weeks. Obviously tire pressure also affects ride/handling. The general rule of pressure is 1psi = 10 lbs of spring rate. This is why in racing, crew chiefs will make air pressure adjustments even by 1/2 lb.

@buddyphillips9790 Жыл бұрын

My car always drives better when the tires are inflated correctly. Sometimes I don't check my tires because I don't have an air compressor, it's too cold out, I'm lazy etc, but when I finally adjust them I can definitely tell the difference. I'll try to keep up on them now, thanks for posting the video guys I enjoyed it

@keithhumco Жыл бұрын

I would not have thought that it would have made that much difference in mileage also I would like to say it's nice to see you guys using a truck that the average Joe can afford instead of the 80-100,000 dollar truck

@crazyhass84 Жыл бұрын

Why would u not think HALF the pressure would have an effect?! Please tell me u arent in charge of any vehicle maintenance.

@ZEEKUPP Жыл бұрын

@@crazyhass84 Good burn.

@scottfurlong5475 Жыл бұрын

@@crazyhass84 It's not half the pressure. Please tell me you are not in charge of statistics.

@rubenbraekman4515 Жыл бұрын

Right!!

@guillaumeauclair8 Жыл бұрын

I think the test you should do is : one(1) loop with +5psi from sticker , and one (1) loop with -5psi from sticker. I own two(2) different Chrysler products with that 3.6, on both vehicules airing up to the prescribed psi door-jam sticker wears the tires in the middle and 'fast' , within a year the tires are done. So I run them 2psi lower in order to wear the tires evenly from one sidewall to the other.

@shitloveaduck Жыл бұрын

You have good common sense! Hard to find! Haha. Small adjustments are fine, especially you are no hauling any weight generally. If in the same scenario you always has the vehicle full of occupants, especially adults, the you want to be closer to the maximum PSI to avoid wearing the shoulders first. Nice comment.

@voided3 Жыл бұрын

I was wondering why on a ~4800 lbs. truck with a ~1500 lbs. payload they would recommend a 40 PSI tire pressure; that seems awfully high for a P-rated tire. Normally 1/2 ton trucks with factory P-rated tires take 35 - 38 PSI, depending on tire/wheel size and vehicle weight ratings.

@todddunn945 Жыл бұрын

@@voided3 Pickups come with quite a range of tire sizes. For example you can get the Ram 1500 classic with 17" wheels like the one they are driving or 20" wheels. The bigger wheels have bigger tires which will have a lower pressure. That is despite the fact that the trucks with the 20" wheels are heavier than the 17" wheel trucks due to more options on the trucks with larger wheels.

@ALMX5DP Жыл бұрын

@@todddunn945 I can only speak for my F-150, but it has the same tire size (265/70r17) and the sticker recommends 35psi.

@todddunn945 Жыл бұрын

@@ALMX5DP Different truck. It all comes down to the weight of the truck. If your F150 is one of the newer ones with the aluminum body it could be quite a bit lighter than the equivalent Ram. That is why the manufacturer puts a tire pressure sticker on.

@bobleone1381 Жыл бұрын

The 10%is significant enough BUT the real concern is in the safety as you mentioned. An accident can cost you a lot more than 10%.........and maybe serious injury or death.

@chuckgrenci6404 Жыл бұрын

One psi change per 10 degrees Fahrenheit change (up and down accordingly), so check your pressures when winter sets it. And you should be checking pressures regularly anyway.

@MrPizzaman09 Жыл бұрын

That sounds about right. I studied this on my 100 mile commute and found you could change it 5-10%, depending how much more or less air pressure I had. Worn out tires also help, but it was 5% at best

@thomastessin1663 Жыл бұрын

Worn tires may show that you traveled farther than you actually did because they cover less ground per revolution due to less tire height which slightly changes gear ratio.

@05EVORS Жыл бұрын

@@thomastessin1663 100% lol

@haroldbeauchamp3770 Жыл бұрын

I think it’s important to note that 85 octane is less than the manufacturers requirement. EPA needs to mandate the minimum octane rating 87 nationwide.

@alexmills1329 Жыл бұрын

Altitude changes the actual detonation point, so to have the same across the board they lower the octane at high altitude areas. But if you drove downhill all the way in that 85 you would have issues or just poor performance.

@xjmg007 Жыл бұрын

@@alexmills1329 yep, people rarely tend to understand air density changes octane requirements. I've ran a Z06 at altitude and it ran fine on 87-89 octane with no knocking. That same octane closer to sea level would knock pretty bad.

@ouch1011 Жыл бұрын

85 octane isn't available in locations closer to sea level and I can't think of a single vehicle with the OEM gas tank that could drive from Colorado to sea-level on a single tank of fuel, so its a non-issue. At a mile above sea-level (or substantially more in many places in Colorado), the air density is so low that the in-cylinder pressures are much lower, so 85 octane is totally fine.

@emmanuelgermain769 Жыл бұрын

I would also like to see with tires at maximum inflation pressure just to see if there is a small gain there. There should technically be a little less resistance at max inflation over standard inflation and it would be nice to see the result of that.

@pohldriver Жыл бұрын

Not with radials. It puts more load on the engine at slower speeds. It also reduces traction. Over or under, either way will lead to abnormal tire wear and shortened life of the tires, as well as increased wear on bearings and steering components.

@CarterEdison777 Жыл бұрын

@@pohldriver Right; and don’t forget the harder ride too! Some people are so cheap

@Mookd0g1 Жыл бұрын

Good analysis and useful efficiency info. Thanks for not focusing only on power.

@piotrk1047 Жыл бұрын

kool vid, Ty for sharing --- lol glad these are still getting decent mpg, waiting to see what ya gonna do with this one 🍿

@KelikakuCoutin Жыл бұрын

Makes sense that handling would be worse with underinflated rubber. I doubt that you would do the test with OVER-inflated tires, but if you had, I would have given this experiment more credence. Thanks for the content. Keep up the good work. בס״ד

@David-nx2vm Жыл бұрын

I had a 2014 Ram with the same drivetrain except mine was 2WD. 3.23 rear end. I averaged 22.5 to 23 MPG combined. I set it up as a highway cruiser and it was great for that. I did road trips through Idaho, Wyoming, Colorado, so similar experiences to you guys. Unladen on a flat road it was great because it could stay in 8th gear. Get into terrain, at elevation, sustained speeds above 65 or get any load in the back, and three things happened. Fuel economy dropped to high teens combined, the transmission hunted for the right gear, and the engine really struggled. It was a good rig but don’t ask it to deliver more than it was engineered to do.

@vr4787 Жыл бұрын

3.23 or 3.21?

@jimbeam2705 Жыл бұрын

If it was ... hunting.... for a gear ,you should have had it in ...tow mode. I always run in tow mode so my tranny isn't hunting for a gear or jumps back and forth between 8 and 4 cylinder running.

@curtchase3730 Жыл бұрын

Try riding a bike with low tire pressure. Then fill tires to specs and ride again. HUGE difference in effort. I think using a huge brick PU truck to show mileage change is less dramatic than a econobox car w/a small displacement engine. The higher mpg's you get normally, the more drop you'll notice w/low tire pressure.

@davidwelty9763 Жыл бұрын

I really like it when you do these experiments, saves me the trouble.

@rubendawn7478 Жыл бұрын

I think this test should be done on highway only, thet city driving changes the whole equation, the friction of the tires rotating also changes with speed but still good content, thank you guys for all you do.

@ltnerb Жыл бұрын

I have a 2014 Ram 1500 CC with the 3.6 4x4 and the 3.55 rear end. I consistently get around 22+ on the Highway running 75-80 with it loaded for vacations. Around town I can get close 17 depending on how much I drive and idle time. Recently I’ve been idling a little more due to carpools at schools and warming up with cold temps.

@nafsucof Жыл бұрын

thanks for addressing that really only new tires would be able to put up with this for a short amount of time without pretty serious damage

@kenrichmond3946 Жыл бұрын

Pretty much my experience as well... Loss of 2-3 MPG. Not huge but the cat definitely handles differently with low tire pressure. It's dangerous IMHO because if you drop below 20 PSI I think there is a real risk of the tire unseating from the bead, delamination, or rollover as you pointed out. I normally run my tires about 10 PSI below factory spec for comfort when I'm the only one driving. At about 15 PSI below factory I can start to feel vibration and know it's time to fill them up.

@timberray9572 Жыл бұрын

I keep all my tires at 30psi for daily driving, we have bad roads where I live. However when I load up my truck or tow something heavy I will fill them all to 40psi.

@tioganh Жыл бұрын

The very best entry music into your video. Thank you so much

@tinshield Жыл бұрын

That mileage makes sense. Had a similar truck with that power train and was always decent.

@robertwayman7974 Жыл бұрын

18 IBS deflation seems a little much for the average person, maybe 5-10, my Wrangler changes only by 5 lbs in winter.

@BrandenBuller Жыл бұрын

Totally agree that ~50% seems a bit more than a "slight" decrease in tire pressure. I'm surprised it was only a 10ish% decrease in fuel economy especially after seeing similar remarks about only a 10% decrease in tire pressure.

@Jtwizzle Жыл бұрын

Im glad he made such a drastic deflation. It really shows if there was a difference and not margin of error type results.

@stanlojewski6761 Жыл бұрын

Excellent test!

@andrewarnott6112 Жыл бұрын

The other big cost to factor in is the extra wear on the tyres, that will be massive

@kevinthomson6324 Жыл бұрын

Small differences in vehicle setup and driving technique can make huge differences at the pump. I started keeping a eye on the current efficiency bar for a few tanks. It barely made a difference on my speed at all but added 80-120 kms to each tank.

@clutch7366 Жыл бұрын

Yes, keeping RPMs low and not downshifting unless you absolutely need to, helps with efficiency. Coasting wherever possible also helps a little. What other techniques can you add to this list?

@Andrew-se9be Жыл бұрын

@@clutch7366 I would add being light on the throttle. Obviously one should keep up with traffic, but not flooring it makes a big difference. Also just generally try to hold a reasonably consistent speed as traffic allows. As Kevin said just general awareness of driving habits makes a big difference to overall efficiency

@Ijusthopeitsquick Жыл бұрын

@@clutch7366 Avoiding unnecessary braking and excessive speed are the two main things that will help efficiency. Accelerating slowly doesn't help much, since the energy required for a given increase in speed is the same whether you achieve that increase quickly or slowly.

@johnhoover7869 Жыл бұрын

Heavy footed acceleration probably leads to a higher enrichment ratio.

@Ijusthopeitsquick Жыл бұрын

@@johnhoover7869 True.

@ImYourHucklebery117 Жыл бұрын

I haven't checked the tire pressure in my truck in like 2 years, good reminder

@mondo_stunts27 Жыл бұрын

I just did this today, (fill up my tires) I’m wearing out my 35” tires faster than I’d like. I’m running 36 psi

@derekl9702 Жыл бұрын

Interesting. Thanks for the experiment.

@Bhpfire Жыл бұрын

Should have run it at Max tire pressure as well to see what that does

@carlstanoyevic3070 Жыл бұрын

Great video thanks

@mikedurham3563 Жыл бұрын

The back tires likely started over-inflated, since there's no way the truck has a 50/50 weight distribution. Watching the tread contact is the only way to really know what the correct pressure is. The easy method uses chalk across the tread and watch where the chalk is removed when driving in a straight line. You can sometimes see this pattern with dusty roads as well. Ideally, the chalk line should be complete removed across the tread. If it remains on the outer blocks, the tire is over inflated and will wear the center of the tire too quickly. Under inflated will leave the chalk in the center of the tread. You can inflate/deflate the tires to find the pressure for these two points, then adjust from there. The best fuel economy will have the most pressure in the tires, while the best balance will be toward the middle of the two bands, and is also a good point for winter tire traction.

@ouch1011 Жыл бұрын

That only really applies to trucks, and even then, mostly HD trucks that run a lot of tire pressure. You might be able to take 5psi max out of the rear tires of this 1/2 ton truck, but then are you going to add it back in every time you put something in the bed or tow something?

@mikedurham3563 Жыл бұрын

@@ouch1011 it works on cars as well, especially hot rods.

@fscottgray9784 Жыл бұрын

Other things that affect MPG are winter fuel vs. summer fuel, traction tires vs. highway tires, mud flaps, lifts etc. If you can find non ethenol fuel you will get better MPG also.

@devengudinas1649 Жыл бұрын

I have used non ethanol fuel and it did get much better mileage and felt like more power in my 2.5 Subaru Forester

@dalelong4716 Жыл бұрын

@@usualsuspectexterminator Spoken like an Iowa corn farmer.

@herb7877 Жыл бұрын

@Usual Suspect Exterminator I believe you are mistaken. Plenty of tests and forums out there showing ethanol does effect mpg's by as much as 10%. In my experiences it was a 10% drop using gas with ethanol.

@dalelong4716 Жыл бұрын

@@usualsuspectexterminator Correction, a really dumb Iowa corn farmer.

@heatherburger1666 Жыл бұрын

Thank you for making this video

@edwardlacika3022 Жыл бұрын

Any possibility that you could repeat the experiment but this time with higher tire pressure than recommend by the manufacturer? Great video.

@delbedrttaylor7458 Жыл бұрын

Good review 👍

@mikefoehr235 Жыл бұрын

I always slightly overinflate my tires to allow for pressure drop due to cold. More air also should improve tire life.

@mikecleveland823 Жыл бұрын

More air will increase the balloon effect on the tire, placing more weight on the center of the tire, causing increased wear on the center of the tire. Slight over inflation of 3-5 psi probably isn't noticeable, but more than that may be. Trucks that often carry loads are difficult because a half ton of payload in the bed will, under ideal conditions, require more pressure in the tires.

@mikefoehr235 Жыл бұрын

@@mikecleveland823 cold air takes care of that

@ouch1011 Жыл бұрын

@@mikefoehr235 negative, inflating to the correct pressure takes care of that.

@slmjake Жыл бұрын

You are the best Andre.

@HAHA.GoodMeme Жыл бұрын

this is my current favorite truck in the TFL fleet

@josipdolic6391 Жыл бұрын

Very good test

@Camaro45th Жыл бұрын

This is great timing that you made this video. I have been toying with the idea of sending you guys the question why the cars computer is off from the tried and true math equation. I have seen that it’s not just your car but multiple cars. Which is more accurate? Are the car companies trying to pull a fast one on the consumer? We need answers!

@captainm7155 Жыл бұрын

Running tires at lower pressure has a significant effect on a vehicle hydroplaning on wet roads. The average tire will lose 1-2 pounds per month through permeation. A few months of not checking tire pressure has numerous negative effects. It would be interesting to see some further tests with your truck regarding skid pad handling and braking, wet and dry, at various inflation levels. Always enjoy your videos. Thanks

@mikedurham3563 Жыл бұрын

You need to reseat your tires if you're losing pressure that quickly, or clean the wheels before the tire is set.

@hitempguy Жыл бұрын

My 2020 2.7 ecoboost supercab F150 got about that in lower speed mixed driving. Extremely efficient in the city

@78Wildboar Жыл бұрын

Nice boots Andre! I have a pair of Salewa boots and shoes. Some of the most comfortable footwear I’ve owned.

@TheDiamond872 Жыл бұрын

Haven't watched the video but simply having driven a bike with underinflated tires tells me all I need to know.

@Jay-me7gw Жыл бұрын

I have a 1995 4Runner with a 22RE. It makes 110 hp on a good day. Plus I am at 6500' so its really making like 88 hp here if I am lucky. Basically, barely enough power to actually go the speed limit. I can feel a pretty noticeable difference between 30 psi, and 20 psi when I am driving home after being air'd down on the trail. The engine is weak enough where it makes the difference between me having to downshift on hill that I wouldn't normally, or simply can't hold speed at all. So yes, it matters.

@Flash1857 Жыл бұрын

Wow a Sinclair gas station, I miss them here. The Dino is a cool sign

@tannerdoberenz2992 Жыл бұрын

BRB, gonna go check my tires. Great video! In my owners manual it gives quite a different range of pressures for different situations. If I’m going off-road it says 25 in front and 23 in back, for regular driving I do 35 for both, and for long highway trips with decent amounts of time over 75 mph but without a heavy load in the bed it says to use 40f 38b. It’s interesting how the front tires get more air due to the weight of the engine, which helps them ware more evenly with the rear tires.

@williamserver4332 Жыл бұрын

Great video

@tomastylecek2065 Жыл бұрын

great review

@gungadinn Жыл бұрын

Besides the additional cost for fuel, think about the accelerated wear on the tires? Underinflated tires run hotter which softens the rubber compound making for more abrasion of the tire. I've seen under inflated tires on trailers wear much faster, and instead of getting 20,000 miles only went 12,000 miles before requiring replacement. I've also never seen a properly inflated tire blow out in hot weather.

@supertrucker1960 Жыл бұрын

Love this video

@davestvwatching2408 Жыл бұрын

Not sure I would have gone down to 22 even in a test. This test does show a number of things to me. Buying a physically smaller truck does help with fuel mileage. Driving the speed limit/slower/not trying to pass by everyone also helps with economy. Plus 70 series/big sidewall tires are a win all around and seeing the Perkins and DQ made me hungry.

@foonus406 Жыл бұрын

With a Gm 3500HD (diesel w/ 10 speed) Denali the best I've seen is 10.2L/ 100Km - roughly 23MPG. Its interesting to see the smaller motor and lighter truck do almost exactly the same. Thanks for the Video!

@chuckersw Жыл бұрын

Andrea would there be any interest in doing a loop with the tires topped off to their max pressure for the tire manufacturer?

@aaronstrand4815 Жыл бұрын

I had a 2017 Ram 3500 with a 6.7 Cummins diesel single rear wheel....a couple times with the cruise control set to 70 mph My average fuel economy hit 30 mpg hyw, summer fuel 70 deg day 110 mile trip to my other property.... Best I ever did, I normally drive faster, it seemed to be an enomenally, I would normally average in the low twenties with faster and harder driving....

@ouch1011 Жыл бұрын

Diesels have better thermal efficiency/fuel economy than gasoline (and worse tailpipe emissions). The 3.6 is also not an especially efficient engine.

@JustinKelly Жыл бұрын

I was expecting this test to be a realistic test such as what one would expect from average temperature drops due to season changes. This I would say would be around 5-7psi. Given that this was an extreme example, I am surprised the difference was less than 10%.

@jameskendrick573 Жыл бұрын

Hey Andre love the boots good purchase

@coyote102076 Жыл бұрын

Now I want to see that exact same test repeated with that same truck on that same loop with the tires aired to 45 PSI and see if you can score 24 MPG on the loop!

@bendino9016 Жыл бұрын

in the summer i run about 40-37 psi, in the winter i run 33-30 psi. i care about grip more than mpg during the snowy months.

@ericensley2427 Жыл бұрын

Great vid

@kingschill23 Жыл бұрын

would be interesting to see inflating tires slightly over the manufacture number, like 5psi or something to see if that did anything

@watershed44 Жыл бұрын

@kingschill23 Might give you a little more MPGs and a tiny bit less tire wear, but you'll get more wear to your suspension components and rubber bushings too. Not to mention an uncomfortable ride.

@davidrandall2742 Жыл бұрын

I've been checking this for decades, and I've found that 36-psi cold -- in the morning without the sun hitting the tires -- is the best compromise for mileage vs comfort.

@ouch1011 Жыл бұрын

That is not a general number and depends highly on the vehicle. Best number is what the manufacturer recommends.

@davidrandall2742 Жыл бұрын

@@ouch1011 -- Not always: the low recommended tire pressure for the ford explorer helped cause the roll overs; often times the recommended psi is about cushy ride comfort, not what's best for economy and traction. -- or in the explorer's case, safety,

@badgerpa9 Жыл бұрын

I am surprised Lil Stubby is not getting even better economy. Once that pentastar breaks in I hope you get even better economy.

@machfive916 Жыл бұрын

Great video as always. I was surprised to see the recommended stock tire pressure was 40 PSI, as that seemed a little high for a 1/2 ton truck; as my 2020 Silverado only calls for 35 PSI.. However, maybe there is a lot of fluctuation between manufacturers.

@devilman3136 Жыл бұрын

I have an 18 quad cab 1500 4x4 with the 3.6. Bought it new with 65 miles on it and it now has 80k on it. Best mpg I've gotten is 27 mpg pen to paper coming down from Vegas to tucson running 70 mph. Average is about 20 on a city highway mix. I also have off road tires on it now and that affects the mpg by about 1 mpg. Worth it

@davidnelson6893 Жыл бұрын

That was cool test I like it

@brucebissell7626 Жыл бұрын

THANKS BRO. GOD BLESS YOU.

@davidberkovits9738 Жыл бұрын

I would have been interested to see what a 5-8 lb difference did. I think for safety sake you went too low on the tire pressure.

@darrylthompson3159 Жыл бұрын

useful information

@philllsxga.7737 Жыл бұрын

I have a 2014 Silverado four-wheel drive near Fully loaded 5.3 V8 Z71.. I get the same fuel mileage and even better I have averaged 25 mpg with the cruise control set at 74.. A 2014 Silverado WITH a V8 and 144,000 trouble free miles so far...

@edwardbat69 Жыл бұрын

What if you over inflated them. I have 10 ply tires on my F150 that can take 80psi. The truck says 35psi. I keep them at 65 which I know is a harder ride. I know that the military tells you to max out pressure on tires when you are in other countries. Supposedly it keeps the tires from coming off the rim if you hit potholes and other things.

@revgordon91 Жыл бұрын

That was interesting!

@timkis64 Жыл бұрын

now that you have underinflation data, perhaps you can over inflate them 15 or so pounds & do a comparison to see if you milage increases by a similar percentage.

@PinealPinePineapple Жыл бұрын

Not only will you have a 10% loss in fuel, you also wear your tires quicker $$$, and increased drivetrain wear. Don't forget that's the only thing touching the ground! Tires are very important!

@TaigaTurf Жыл бұрын

Single cabs are so tiny now, my 2003 ram short bed had a nearly a foot behind the seats, and more headroom as well..

@joezephyr Жыл бұрын

Fantastic thank you! I now have to ask Nathan :)

@topenddean Жыл бұрын

If you've ever ridden a bicycle with low air pressure in the tires, then you know how hard it is to ride. Then you pumped them up to proper pressure, and the bike rolled so easy and it was much easier to pedal and the bike was much faster.

@cmdrdarwin3682 Жыл бұрын

This is proof that pickups can get decent fuel mileage, if the manufacturers would start streamlining the front to reduce drag, instead of making them look like a flat front beast! Are you listening Toyota?

@Spennyman10 Жыл бұрын

Hey guys I have the very same truck. Mine is a '15 157k miles, 3.6 auto 4x4. I caution you on how long you intend to own it. My 3.6, which has plenty of power, has developed the dreaded #2 cylinder misfire. Chrysler knows about this and has had some recalls on '14s and below. I've replaced the plug, coil and injector to no avail. Most internet sources point to a bad head due to a cracked valve seat. No one in my area will tackle this except the dealer. The book calls for 14.4 hours at $165 an hour total of $2376 not included the head. The engine has no other issues to speak of ticking, leaking etc.... shame on Chrysler.

@christopherwilson9140 Жыл бұрын

12:45 you have no idea how many times I came off the trail and everybody wants to do 85 down the highway to get back to camp on like 18psi.

@noeldillabough Жыл бұрын

I lower my tires from 50 psi to 45 psi every winter, I've always thought that gave me a tad more traction in the big freeze. I'd love a traction/braking test to know if I've been prudent.

@hedydd2 Жыл бұрын

42 would be too much pressure for my work trucks and 38psi would be just right for a balance of economy and safe road grip. On the other hand 22psi would cause the shoulders to overheat at highway speed, would squidge dangerously in bends and ultimately get a puncture due to shoulder damage where the tread meets the sidewall. Fine for low speed on sand for short periods only. I would never ever road a pickup at less than 28psi

@hedydd2 Жыл бұрын

@Usual Suspect Exterminator Indeed. My trucks are rated to carry over one long ton and to tow 7700lbs and do recommend 38psi for this load. They are not Ram. They certainly do not recommend pressures anywhere near as low as 22psi on the door sticker. I think the tires have a maximum pressure of 45psi moulded on them but that is to seat the beads when mounting a tire on to a rim.

@hedydd2 Жыл бұрын

@Usual Suspect Exterminator I do not believe that to be correct.

@hedydd2 Жыл бұрын

@Usual Suspect Exterminator Exceed 45 psi car and light truck tires when mounting and you run the very real risk of a massive explosion. The bead seating maximum is the same as the maximum recommended running pressure on this category of vehicle. Heavy duty trucks of course can run at 90psi or higher. Different category of vehicle altogether. I have been responsible for the health and safety policies and monitoring of a fleet of vehicles.

@09roadraider40 Жыл бұрын

You should do the same comparison between the different octanees of fuel

@james10739 Жыл бұрын

Dang these prices are still crazy here in Central Texas I just saw $2.439 a gallon for 87

@bluceree7312 Жыл бұрын

Even on my bicycle, riding on 120psi is a lot smoother than on say 80-90psi. Rolling resistance is less, but also is traction so you need to be careful not to cause tyre slip.

@herbwheeler4470 Жыл бұрын

Who runs bicycle tires at 80-90psi? Nobody.

@bertschb Жыл бұрын

@@herbwheeler4470 Road bikes are over 100psi. Mountain bikes 25-30.