I was in the petroleum business for 40 years working in refining, pipelines, terminaling, and additives. Lake's presentation is the best I have ever seen and he is correct on every point he made. Everyone should see this presentation, put in particular those who are running high compression, high performance engines.

“Our engines are designed to run hard. Thoroughbreds were designed to run, not walk”. I’m going to get that painted on the inside of my garage. Greatest line. This was an excellent episode with a ton of incredible information 👍

When I initially tuned in, I saw the one-hour video length and thought, there's no way I'm listening for an entire hour. However, by the time I got 10-15 minutes in, I began thinking that I could listen to this information for another couple of hours. I liked, subscribed, and hit the bell notification; did I miss anything? Great stuff!

Lake really does have a talent for teaching this stuff and he is SO knowledgable. Such a treat to have him involved in PCA.

This was an OUTSTANDING Tech session. One of the best I've seen. Thanks Vu for bringing this subject to us. It was a major question to which I needed answers.

This IS the best video you have made; very informative and great guest!

One word TECHRON fuel additive Been using it since 1980 when Mercedes Benz approved it to clean intake valves, combustion chambers, injectors and intake ports. I'm retired after 48 years with M-B and BMW Star & Master Technician. Love Lake Speed Jr 💦🛢️✌️👍

Awesome presentation! I learned so much that I feel like a professor! Lake taught me some new things and reinforced some things I’ve learned before. First Tech session where Vu didn’t have to prompt the presenter with questions! (Lake is never at a loss for words.) Thank you gentlemen!!

Thank you for the interesting and educational (and detailed) view into fuel quality and what to look for to put in our engines.

Loved this! This guy dropped some knowledge in this community! I would love to hear his take on oil quality. Great Tech Sesh.

Incredibly great presentation, I have been a “car guy” my whole life, but learned tons. I hope to see Lake again!

Excellent video. Valuable information just shared with many car enthusiasts. Thank you.

This was a great one. Something for everyone here. The session goes from a complete novice discussion to industry technical, with just enough academics. Whether daily-driver or seasonally-garaged. California to Denver, and everyone in between. Mr. Speed never talks over anyone's head-- although I'm sure he could if he wanted to. Reminds me once again just how much of driving [until recently...] is trying to manage a controlled explosion...

Fantastic session. Mr. Speed, you are a font of knowledge.

Tryin' to hang, but an "Executive Summary" version might be a win-win! People can always refer back to this extended portion if desired. Fantastic info tho! Gonna ensure we use the Top Tier fuel when possible and the non-ethanol when we can. I try not to get that ethanol crap, but its tough!!!😀

What a great presentation! So many questions answered. Thanks Lake and PCA.

Favorite tech video I’ve found so far, big thanks to our favorite tribologist!!!

Great tech session! Thank you for sharing.

Just discovered Lake and the PCA Tech videos a few months ago. Both superbly present a huge amount of complex info in an understandable way for those of us who are just starting to learn about petroleum products and synthetics and those who are coming from a wealth of knowledge. Love how Lake says "not to hate" on him for people who have bad memories of high school chemistry classes. Thank you Lake and PCA!

This was OUTSTANDING, I've love to see more of these Tech Sessions!!!!

look at those prices on the pictures of that Shell pump... $2/gal? We'll never see that again ..

Amazing information. And Professor Speed laid it out so that even I could understand it. I was putting all the wrong things in my Porsche. Hope it's not too late.. Priceless lecture!

Awesome video 📹 👏 👌 👍 😎💯 I use non ethanol only in my 1987 911

Great episode! Learned a lot about gas and limiting engine wear. (don't warm up your car for extended periods) Glad you're feeling better Vu!

Excellent video, thank you.

Awesome informative video. I see you endorse Shell V Power nitro plus. I use this all the time.

What a great informative video that explains it well. Thank you.

Such a great episode. Thanks Professor Lake Speed (OK, such a perfect name for a car and oil/fuel guy)

Awesome information. I moved to East NC 2 years ago from AZ/SoCal and found we have 93 octane instead of 91 but we also have a lot of Non-Ethanol gas available at the pumps. From 88 Octane all the way up to 93!!! I've been putting the regular octane Non-ethanol in my '76 Blazer and 93 Non-Ethanol in my '87 951

FYI, About 80% of the fuel cost in the UK is tax. Great video. More please!

Really enjoyed this video! Very informative and well explained I learned a lot! Thank you

Great presentation - Thank You!

Wow what an interesting and helpful live tech session. Thank

Vapor burn! I like it …distillation curve!

Awesome content! Thanks lake! I learned a lot

Absolutely fantastic video, thank you so much.

46:55 the only time I ever got “bad gas” was at a Shell when the truck was actively filling the tanks.

Best regards from Slovenia to Vu and to professor. Amazing.

also, what about the newer generation Direct Injection engines? and carbon build up in the intake values .... is that a big issue with the latest generation 992s?

Great video. On the matter of cold weather starts (whether after storage or on a daily driver) I’ve always wondered if old school block heaters would enable us to avoid a lot of those cold weather hazards? Would be great to understand that.

I’m on a road trip with my new to me as of 3 days ago ‘17 Macan 2.0L from SC to MO. After watching this I stoped by the store and grabbed Lucas for the oil and a bottle for the gas. I was averaging 22.7mpg it’s now sitting at 30mpg average after reset for 30 miles I know it will drop. But still that’s impressive I couldn’t get it there period before. The car is 10xs smoother quieter and seems to accelerate a heck of a lot better. I was between marvel muster and Lucas but man this stuff is great, I’ve been watching videos on tunes I can buy for $600+ this is a $30 “mod” with instant results 50 mile update Oil temp before the two additives was 212 initially it went to 220 now it’s 207 degrees F

Very informative video, never knew about the PEA in the additives, now I have to look for which ones have PEA. About not refueling when the tanker is at the station filling the gas station tanks. I understand about the bad stuff getting mixed around in the fuel tank, but doesn't the fuel pump pull from the lower part of the storage tanks? Doesn't make sense for the fuel pumps to pull fuel from the top of the storage tanks. Which would mean, there must not be too much bad stuff sitting at the bottom...unless the very bottom is emergency storage in the tank to prevent the pumps from pumping dry, and the pick point for the fuel pumps are a couple of feet above the bottom...is that correct? Does anyone know for sure where the fuel pump pick up point is in the storage tanks?

thanks for this masterclass. Greetings from Spain :)

Very enjoyable! But what he missed was explaining how even with PEA you can't clean the intake valves via the fuel tank additives or Top Tier fuels on Direct Injected Engines. That only works on Port Fuel Injected engines.

Great video. I really appreciate the comments about the octane number being different in different countries. Where do I find a good chart to see the conversions? Also, if you have an older Porsche that might have had an engine rebuild and a non standard compression ratio, how can you look up the octane quality required for your engine?

Watched this one again, so would 90oct Non Ethanol be ok to use in the 3.8 motor? Would/should I add some octane booster?

This was an EXCELLENT episode. So much great information from Lake Speed, Jr. Based on this news of 15% ethanol, I would love to hear him come back and talk about it. I know the advice would be buy ethanol free gas, but that's not always possible. So what should we be doing to combat this to not destroy our motors that were not designed for this? Do we have to be more careful when pushing our cars this summer? Do we need to make sure we're putting in a really good PEA additive at each fill up this summer? If so, love some recommendations on any particular brands. Thank you.

For me to take out my 911 I need to re arrange parking for 2 other cars, It takes about 5 mins from when I start the 911 till the other 2 cars are re-parked and I can leave home in the Porsche. Is that ok or do I need to start the 911, get out of the driveway drive for 15 mins, come back and re-park the other cars?

Absolutely outstanding session! I have Learned so much. Worth every single penny of my PCA subscription just for this one video. Just wish I had watched it earlier. Thank you! 981 BS 2013. Canada 🇨🇦 1:01:48

Can the Porsche classic fuel additive be used at every fill up? Instructions indicate that it’s for long term storage,. Thanks

I own "ordinary" cars and a pickem' up truck but I learned so much. One commentary I heard one time was that in the summer with heavy traffic on interstates some big stations got deliveries as much as seven times a day. If I live close to an interstate exit would it be better to get my gas there or one I normally go to closer to home? Just curious.

For my 2019 mercede g63 should i use shell 93 or chevron 94. Im lost chevron 94 has no ethanol. Why does he use shell 93 then?

Awesome video

1) Initially thought: this was going to be a joke, talking about fuel for over an hour. 2) Final thought: I want more. Going to listen to this a second time at some point. Thank you and geat job!

So let me get this straight, we are talking about clean valves from top tier gas and fuel additives, but aren't most recent Porsche engines \ direct injection? Isn't the fuel going directly into the cylinder? How the heck is it going to clean the valves?

Hi. Now, I'm not a PCA member as I live in New Zealand, but I thought this might be of interest ref: this extremely good video. I wanted to see if I could improve my engine performance (996 mk2) without messing with, but complimenting Porsche factory mechanical design ... Around 2000kms after a full rebuild (IMS) I had my ECU reprogrammed to run on 98/100 octane. This has made an extraordinary difference to an already fabulous engine. Increase to 361HP and and 412 NM (Rolling dyno). Fuel consumption is also much improved. (Town11.3 ltrs /9.3 per 100 kms long run). Of course, this may also be due in part, because Porsche underestimate their engine power from the factory? Then, there's ethanol additive ... what's this for 98/100? So what am I saying? Many years ago I was a Porsche workshop manager in Brooklyn, and I've been a Porsche fanatic ever since ... and I wouldn't want you lot to miss out on any of the fun!

I filled up at Shell with Premium for my high-performance motorcycle and it fell on its face. Had to purchase an octane improver to use it. This can happen anywhere. I filled up at a station that probably didn't have much use for Premium. Another factor to consider.

I let some ethanol gas sit in the tank of a vintage 2-stroke once for several years. Guess what happened? Started right up and ran like new. How is that possible? Most 2-stroke oil suppresses corrosion and has it's own additives to prevent separation. We had another bike, a notably fussy German Maico (the Porsche of dirt bikes) with 12 year old fuel in the aluminum tank. No corrosion or damage, but at that point it did run funny. But! Porsches don't get premix, so ethanol will definitely be a problem if you let your car sit. I still eagerly await the first 2-stroke GT3. Imagine the sound.

What's a good PEA additive?

Excellent!

your a gas god know some of this your right on

Very informative presentation. Unfortunately, where I live we can now only buy ethanol blended (10%) fuel, and summer cars are put into storage for 8 months of winter. So, for those of us who have absolutely no choice but to have have ethanol blended fuel in our tank while in winter storage, is there anything else we can do in addition to adding stabilizer and having the tank full (which most folks around here already do)?

'Premium' fuel is a bit of a con, as it's not difficult to raise octane levels, certainly not the 20 percent extra cost. I'd guess it cost them almost nothing, Or am I wrong? I often am.

Indulge another question, thank you. I grew up in upstate NY and we had brutal winters and we always used a product called "Heet" in the cold weather to remove any frozen particles in the gas and for easier starting, but since I have been down South I still use it occasionally and my friends have never heard of the stuff but I guess it's a habit with me. Am I nuts (my wife thinks so) and p....ing my money away?

I don't have access to Ethanol-free gas at the gas stations in my area. Would racing fuel be an (expensive) alternative for storage?

Vu, it seems like you could provide us with a list of fuel additives that have PEA. That would be really helpful for your members, I think.

what is the minimum octane fuel you would use on a 1983 911sc...

Thank you for the great video. Lake mentioned idling in cold weather is bad. So it’s not recommended or needed to start the car and let it idle a few minutes in the mornings before driving (specifically in temps of mid 20s and 30s)?

40:10 Super true👍👍👍👍

what about using 100 Octane gas mixed with 91 Octane gas in California?

does someone have a TLDR of this video?

Is it possible to have top tier non ethanol gas? If not, should top tier take priority over searching for non ethanol?

Some good tips on maintenance. totally off base about knock. First, "pre-ignition" doesn't happen. The proper technical term is autoignition aka spontaneous ignition. The pressure spike always happens several degrees after TDC when you have peak cylinder pressure, never before spark timing. Logically, how can you manage something that happens before the spark plug fires by changing spark timing? "Hot spots" and carbon are also not factors. Even the PhD at SAE don't know what's going on. They'll only tell you to use the octane the engine needs to not knock...and a very good synthetic oil.

Good luck finding non ethanol fuel 😆😆😆 VP racing has it at $60 for 5 gal

52:22 "long term storage"? LOL wtf?

Australia uses, 91,95,98 rating

If I had the patience to listen to someone run-on and on for an hour, I would still be married. After 20 minutes, I went outside for a cigarette. Came back in about 20 minutes later… still talking; didn’t even know I was gone. But somehow, it’s my fault and I need to pay more attention to, something. Yep… Wonder what’s for dinner… Nothing… Shit.

That whole thing about gas delivery mixing up the phase separated junk in gas station tanks is BS.

Makes me want to buy my first electric car

Here is the million dollar question. Is Costco premium considered a top tier gasoline. They advertise they are. Lake is correct. The companies all buy the same RBOB. Then they add the alcohol and proprietary additive package. The trucks often have residual fuel between loads. 100-250 gallons per delivery. There is also residual fuel in the hose at the pump. Good stuff guys. Sold my 991 and recently bought a C8. The car is a blast. Give it a try if you get a chance. See you at the track.

I'm even more confused now :(

And yet time and time again I watch guys pull porsche motors apart and they are spotless inside. I would love to know the ratio of people who pick these certain oils and fuel vs the ones that just grab Mobil1 or Amzoil and fill up at their local gas station and don't bother with Porsche specialized stuff. I still laugh at the YT video on synthetic for old Porsches. This is a dealership service department joke to sell more services. You have to ask yourself why a porsche service manager is a commission based job. This is an age old ploy to sell more oil and additives. What a waste of money for nothing. No one ever asks the question... how MUCH more moisture will a certain fuel hold than another fuel because you'll get a deer in the headlights look. They won't know the answer because if they did, it would be inconsequential. These poor guys have drunk the koolaid and lost their common sense and don't have grandfathers to tell them any different. Change the filter and use the same oil for 10-15k miles. Or... do your own experiment. You'll be surprised at the results. Porsches aren't delicate Swiss time pieces. Drive them and they will last you a lifetime. Ever wondered why you see all the 25-30 year owned cars for sale that run perfectly? What happened to the reputation of a German manufacturer? These cars are tough. Stop trying to make them seem like cream puffs.

Could have said what he said in half the time . Boring and just over done.