People should take notes on how he does videos. Straight and to the point, no clickbait or unnecessary talking to fill time. Thank you.

The only true KZfaqr who doesn’t click bait actually sees people’s comments ideas and does them. It may take him awhile but he does see them and comments on them thanks for being such a great KZfaqr!

I think the theory of it leaking is because a leak already exists, but the conventional oil already sludges up over time and sealed the leak. Then by adding synthetic, it penetrates and cleans out that area and therefore may start to leak again.

The amount of work you put into you're videos makes you a legend and you deserve more then you get!

I think I speak for most people when I say it's very satisfying watching your work in the field

this man has managed to make a race between oils feel exciting, well done sir!

This is hands down the best channel I've seen for practical, concise product analysis.

I am addicted to @Project Farms videos as the testing results are quantitative, factual, and not interpretational. The hard work and detail in the videos is very impressive. Great work and look forward to watching more videos. Thanks!

Can we just appreciate how he replies to 95 percent off comments at this amount of subscribers? Edit -how many likes lol

You’ve taught me a lot more than anyone else ever could about how an engine works, what to use and what not to use and just about life in general. Thanks for teaching us all something.

I am astonished at the production quality of these videos. What a well done job.

This man puts SO much work into these videos!!

"I'm going to put the filter media in a press to squeeze the oil out" *Expects a professional hydraulic press of some sort* ... it's a vice with a couple 2x4's... Keeping it real. This is why I subscribed!

What I have been told is that Synthetic oil doesn’t attack the engine seals, but instead it cleans up any engine sludge which been helping poor seals from leaking. Great video!

With all you've done to those engines during every episode, you make engine work look a lot more simple and a lot less intimidating than i originally thought. You explain things very well

I don't often watch with captions, but even your captions are thorough and detailed. Thanks for making this show. You're doing great.

I can’t believe the amount of work that went into making this video. The drone shots/editing in particular are amazing! Love this channel!!

I like how you popped a wheelie in the tractor

Your shear enthusiasm is so inspiring. Thank you so much for your channel!

You do an outstanding job on your videos. They are direct, informative and very educational in content. Two thumbs up from Kingsport, Tennessee!

Drone footage: Thumbs-up! On a side note, wouldn't you love to be friends with this guy?

This is by far one of the best channels on KZfaq. No bs straight forward and to the point. Keep up the great work.

Would love to see an oil filter comparison test like Fram, Motorcraft, Wix, Napa Gold, AC Delco, Purolator, STP, Mopar. Always love watching product comparisons. Also notice that tractor did a wheelie(awesome)!

Your tractor is in Great shape for its age. You really take care of your equipment. Thank you for all your time and effort in these videos. We all appreciate you!

After working for over 40 years on all types of vehicles and support equipment (generators and air compressors) I've learned that synthetic oil use has caused leaks to start on equipment but it is not because the oil damages any component or seals; the reason these leaks start is that synthetic oils have a higher detergent content and they clean up all the dried up gunk between the seals and the shafts. these deposits are built up over years of use and they get caked on to the seals, once the synthetic oil cleans this mess up the hardened seals are not able to keep the oil in the assemblies. So the answer is NO, synthetic oil does not cause leaks, worn seals/shafts do.

You're such an awesome person and youtuber don't ever stop producing these high quality and high informative videos!

It may sound strange to some people , but l actually felt a peace come over me as l watched the tractor shredding the weeds and grass. I guess it's because it brought back memories of my granpa on a farm tractor working the land. I was a boy and enjoyed those long, peaceful days, sitting under the huge oak tree watching the tractor go by. Thanks Project Farm . I really enjoy your videos, extremely informative. God bless.

This is the testing we need to see if these products ACTUALLY WORK! Thanks for putting in the time! Love your channel and have for quite some time!

Amazing how much the production quality has improved over the years. This is one of my favorite channels!

Finally a oil filter reviewer that realizes that all the metals inside an engine are not magnetic. This is why I watch your channel.

As everyone is saying - excellent, instructive videos and experiments with no fluff or wasted time. Good work. (I've converted a dozen cars and motorcycles to synthetic at low to very high mileages and no leaks that weren't already there)

Best channel out there. Great real world information. Lots of hard work goes into this and great content. Thank you and keep making videos.

45yr old tractor, in "tractor years" that's about 10yrs. These oldies are pretty much bullet proof if maintained properly.

I love how you've evolved your tests to increase accuracy in these comparisons, like in the bearing test. Keep up the great highly informative work!

Just discovered your channel. It is first-class in every way. About 18 months ago I bought a project truck 94 F250 with7.3 IDI engine. I bought it because it ran so strong. First I changed all the fluids not knowing what kind of oil was used in it before. From the time I owned it until I got the time to start working on it, I noticed it didn't have a leak of anything. First I changed the oil and went to a synthetic. Since then I have spent $$$ on body and paint. Though not many miles were put on the truck I noticed a small leak in time out of the rear seal. I put a quality stop leak additive in it but it has not stopped the leak. After seeing this video and reading the comments I now understand how the new oil may have created the leak. I've also noticed a small seeping of the valve cover gaskets that wasn't there before. I will have the repairs done because I can't stand any leaks in any of my cars. Now, I'm wondering to avoid any new leaks after the repairs should I go back to conventional oil? I don't want to create any new leaks that are not there now? Your opinion would be greatly appreciated. PS there is no wonder why your channel is doing so well. Your stats are off the hook. Your hard work has really paid off. Good for you.

I love your videos. Very informative and to the point. Being a professional automotive technician for 40 yrs , Its nice to see someone who actually understand and takes the time to explain whats going on, an art thats lost in this day and age. With that being said, my personal 86 F250 6.9 Diesel always used a qt of oil every 500-750 miles. Oil changes done religiously at 3K. When I switched to the exact synthetic you used in this video, the truck would use 1 qt of oil every 250-300 miles. Never leaked any. After 3K miles , and 10 qts of oil added , I switched back to conventional oil and it went back to the same 1 qt every 500-750 miles. I did not notice any MPG improvement or changes in power when using the synthetic . Truck had 200K at that time. Keep up with the great videos !!

when I switched to synthetic oil on my 1963 KMZ (Dnepr) K750M, it did start to leak oil around the alternator, but not because the oil eat or destroyed the seal, but because it worked so well with its anti sludge properties, that the old gunked up oil around the old seal (just one big o-ring) was removes, but after replacing that seal, my engine works like a charm :P (the old seal was dry and had no elasticity left)

Those overhead shots have to be the coolest time lapse you've done ever

You’re videos are always very well done. I know that you don’t get paid by sponsors but you should. I use rotella T6 in my Jeep 4.0 and it works awesome. No leaks and the internals look very clean.

Best channel on KZfaq. Hands down!!! I cannot wait for new content!!! Thanks man

I'm amazed you have a 40 year old diesel that doesn't leak oil.

High quality synthetic oil has anti-sludge additives that can sometimes open old paths that were closed by dried sludge causing a leak. But this means that the seal was probably bad and due for replacement.

I enjoy your videos, very informative and I like the lengths that you go to show the difference between products.

Love the drone footage, your content is the most useful i've seen

The amount of time you put into this videos for our joy is just remarkable. Keep up the good content and the good work! Cheers from Sweden

KZfaqrs who test Oil issues in their old tractor by cutting weeds and hay on ~20 acres: Zero Project Farm: "seemed like a logical, good test". Thanks for your incredible work!

Project Farm,your the best at the comparisons vids.

Hands down best videos on KZfaq!! Tells u exactly what you want to hear every time!! Not about what is going on with the cat and dog and every body else that walks in the videos thanks for that 100% 👍

That overhead view from drones was AMAZING, awesome time lapse footage and excellent testing setup as usual, you my friend are a KZfaq must watch.

I have been using synthetics since I got my drivers licence back in 1976, Back when Mobil 1 was about the only synthetic oil out there. Back then everyone said don't use it your engine will leak oil and your bearings will go bad, well none of that happened. In 79 I was in the U.S.A.F. stationed in northern Main after a blizzard and temps well below -35F my jeep with Mobil 1 in it was the only car in the barracks parking lot that started.

That footage of the tractor in use took me back to my teenage work. Thanks for including that. Pure magic.

Your videos are great!! this one with the drone tractor footage was very satisfying!

the horse race like announcing for the cold oil race was perfect.

So, synthetic motor oils that cause “leaks” are generally from the effectiveness of synthetics cleaning varnish/gel on neglected engines. Any wear or leaks may have just been masked. Also, still would love to see synthetic show-down on the new 0w-16 Toyota/Honda/Mobil one stuff and same for 0w-20 OEM oil from the Japanese imports compared to each other and high ends like valvoline advanced syn, penzoil ultra platinum, amsoil etc

Would love to see a video comparing all the different best oils for Diesel engines! Your channel is awesome!

Loved the drone footage. Nice work!

Sleep or watch a oil for tractors comparison?!? Ahh... who needs to sleep!

My experience as a mechanic: Typically, in a well maintained, or newer, or low miles/hours, or engine that started using synthetic oil early in its life, won't leak at all. Older engines, or ones with high mileage and have never used synthetic almost always leak when switching to it. Synthetic oil itself doesn't cause leaks, it simply exposes already bad seals that the conventional oil couldn't sleep through. Once you change the seals, the leaks stop. Great video as always! I especially liked the T4 and T6 comparison, thank you

First class video. First class comparison and evaluation. This is the standard to match. Thank you

PF, I can honestly recommend your vids to ANYONE who loves Science. Thanks for all you do here. Can I ask, while you were out doing the fieldwork, who was it that was operating the drone? And some of those shots really made me smile too!

I am far from a professional, however work in the automotive industry. I like the video. The general consistence on synthetic oils is they do not cause leaks. Leaks observed after switching from a conventional to a synthetic oil are results of the detergents and additive package cleaning up sludge and deposits with in the engine. This added to the fact that synthetic oils are designed to flow better results in existing small leaks to become more obvious.

I liked his expensive and highly technical press that he used on the oil filter pleats.

I was a little surprised to see you add that oil additive for compression help, being a self- proclaimed skeptic of products like that, but it made me feel better cuz I do it too. Thanks Todd

Great video testing as usual. Have a 96 exmark mower, 2004 Kubota L48 TLB and a 2011 F250 diesel. All after breaking used mobile one syn, 2 years ago switched to T-6 have had no problems. The backhoe is a bit quieter. The Ford runs about 4 degrees cooler and also use it in my snowblower and stand by generator. No complaints. Thx, your very informative.

Can we all take a moment to appreciate the fact that this guy can operate a tractor and fly a drone at the same time! Lol 👍

On my 36+ years old Audi the synthetic oil didn't start a leak, also when switching from partially to 100% synthetic on my 15 years old BMW it didn't start any leaks! Keep the good video coming mate, I love your videos.

All your videos are entertaining and educational Keep up the good work Thanks

You are fighting the good fight bro, keep these up

No wonder he has a life supply of lawnmowers, Dude has got lot of grass to cut!

I love how much thought you put into the process and how much work you do for just a 12 min video. This video must of tool weeks to make

Just got an old diesel truck and you’ve answered 2 of my questions with this video and you’re anti gel video 👍

Awesome Video!! Your videos are always entertaining and very informative. Great Job!!

Oh man during the mowing montage I could feel my sinuses closing up and eyes watering Lol

This was very interesting. I just watched this with our mobile 1 engineer and reliability department at a gold mine in northern Ontario. We thought it was great, thanks

Nice video and professionally tested. Thank God this video is made

Very informative video. Very impressive footage. I’m subscribed for life! 👍🏻

can we all just take a moment to appreciate the farmers of America? the life blood of the country

that overhead view of the hay field getting mowed was really cool!

Anytime i want to know something.. i check to see if project farm has a video on it first.. i trust this man

U deserve at top rank on youtube. I love ur efforts plz keep it up.

This “myth” has never stopped me from using synthetic in anything. Synthetic is pretty much always better than regular oil so I try to take advantage of that

You're the only youtuber I turn my adblocker off for. Thank you for all you do! I know this takes a lot of time and money and I appreciate it. I dont have any video recommendations because you've been so good at picking up the ones I would want to see but didn't even realize I wanted to see it until you did it!

Great video, you put so much work into each one, serious respect! I think synthetic oil is perfectly fine to use, in the heavy equipment industry we use synthetic (sometimes T6 actually) in everything including old equipment with tens of thousands of hours.

There are so many KZfaq channels out there, but if there were such a thing as a KZfaq Hero, this guy is mine. He test things we are curious about. His test are not influenced by money. I try to not miss a video and as a gunsmith, I have shared some of his videos to my gun shop’s Facebook page. Please keep up the great work. Just one question, what software do you use to edit and make your videos?

Synthetic oil causing leaks is a myth. Conventional oil tends to have far fewer detergents and dispersants than synthetic oil, and it also tends to contain more impurities. This means that conventional oil will be both more susceptible to sludge buildup and less capable of removing said sludge and keeping it suspended in the oil to be removed by the filter. Conventional oil is also more volatile than synthetic oil of the same viscosity, which means that as the conventional oil is heated the "lighter" components of the oil are boiled away leaving behind a thicker oil. This happens to some degree with synthetic oil as well, but as you could see from the oil pour test it has a much greater impact on the conventional oil's viscosity. This thickening phenomenon is one of the reasons why they have you change your oil at regular intervals, and why your vehicle's owner's manual says to change it more often if you put your vehicle through more heavy duty use cases, like towing or racing, since your engine will run hotter for longer in those uses. Synthetic oil's resistance to this thermal breakdown is one of the reasons you can go longer between oil changes when using synthetic oil. Putting all of this together, an engine running conventional oil will have more sludge buildup and the oil will get thicker the longer it is in the engine. These two things work together to mask any marginal oil seals that are on their way out and would otherwise be leaking. Once you make the switch to synthetic oil the extra detergents help clean the sludge out and the "thinner" synthetic oil will begin to seep out through the areas that were previously plugged with sludge, exposing the bad seals. If the engine had been somewhat neglected before the switch to synthetic and hadn't been getting oil changes on time, or if it was operated in particularly wet environments (water in the oil is one of the sources of sludge), then the amount of leaking after the switch can be significant. If, however, the vehicle was well maintained with on time oil changes at the appropriate intervals for your use case, then the engine likely won't exhibit any leaks when switching from conventional oil to synthetic oil.

When you opened that oil filter I saw a large chunk of metal, thought "Oh Man your tractor is toast!" Turned out to be a chunk of dust on my laptop screen. Please keep these great videos coming!

Again - Great information. I'm now supporting you via Patreon.

Great video! I buy all kinds of old vehicles that have been sitting and I revive them and keep them going. I always change oil as a start to any of them and usually run a cheaper conventional oil first then switch to a good quality synthetic after a few hundred miles. I've never seen a leak start from synthetic oil. Even the other day I asked for an oil change kit as my local parts store and the guy behind the counter asked if I'd always used synthetic in it. First time I was ever asked that. He said they can cause leaks and honestly I'd never heard that before. I told him I'll take the risk based on my years of the same routine! Thanks for this video!

I really love how utilitarian your channel is, and it’s filmed very well too. I must admit I’ve taken inspiration from you while getting my own channel going. Thanks for your awesome content!

Man, I’ve always appreciated this channel for the large amount of unbiased detailed information. But after watching this, there is even MORE detailed information and facts that I have never considered. Project Farm has been and always will be the most awesome KZfaq channels out there. Thank you.

Another great, informative video! Keep em coming. 👍🏼👌🏼

thanks for the video. loved it and im glad to see the voa of t4 and t6.

Years ago, I swapped the oil in 2 350 Chevrolets, one from 1970 and the other from 1986) to synthetic. No leaks.

This is the way you do videos on KZfaq. Informative, highly interesting and no advertisements. Well spoken, volume, tone and the ability to keep the viewer's attention. A well done series, that I subscribed to long ago due to content.

I have a 20 yr old truck Chevy 2500 HD ive owned since new w/ 178k mi. and used synthetic the last 10 yrs, no new leaks but it has been weeping from rear seal for also about 10 yrs, but doesn't leak enough to even leave a drop on the ground. I am hooked on these videos. Thank you.

Another great video. Never waste my time watching project farm!

I've heard this many times over the years. Really glad you tested this rumour. You have a great YT page! Thanks!

I love this channel. Thanks for the tip on "Engine Restore." My 25 year old Kubota is now starting up almost immediately. I've also been running T-6 in it for a couple of years with no leaks.

That was an excellent informative video I have no comments except for one I love your old 45-year-old tractor that is a cool tractor

Never had a leak and I switch to full synthetic on all my vehicles when I get them. Love your channel, thanks for all you do.