Thanks for letting me visit. It was great seeing the shop and talking about engines and my favorite topics - piston rings and motor oil!

"There are no secrets, there's just stuff I don't know." That is the million dollar quote. Never lose your curiosity, be a life long learner; regardless of whether you dig ditches or launch space craft, stay curious and teachable.

I love how humble these guys are.. They can admit when they don't know something... intelligent

I swear i could listen to these guys all day. Most engineers built some pretty cool stuff but never got their hands dirty. These guys know their stuff

I appreciate you put yourself on camera and said "this is what I do, tell me if it's right or wrong, and why". And there were honestly a thing or two he asked you to adjust. Some places would never let that see the light of day. However, it makes me respect your work more! If my engine builder isn't learning, their product isn't getting better

The insatiable hunger for knowledge is what makes/keeps these guys great. No ego, no shortcuts, just seeking the best way to construct a product. Awesome job.

Who the hell ever thought I could sit through an oil video and be entertained by the subject. Thanks Geek.

40 plus years a mech and this video was mesmerising!

Lake Speed Jr has so much knowledge that I gladly watch anything he has to say

I was a auto technician for 38 years and agree most engine failures and problems are due to lack of maintenance. Great talk by the way. Excellent

I used oil analysis when I was an owner operator. The condition of the oil tells you so much about the condition of your engine. I never experienced a single catastrophic failure in millions and millions of miles of operation. Your oil tells you what is wrong well before any kind of failure and you can get it scheduled for repair in plenty of time. We used 1 micron oil filtration and sampled every 15000 miles on our MBE4000s and made engines everyone told me would die around 850,000 miles all run 1.5-2 million miles before rebuilding. We bought them around 550-600k miles and ran them as team trucks. Most reliable trucks I ever owned.

This is probably my favorite video so far from Dave's auto center. The conversation with Lake speed Jr is fascinating to me. Now if we could get you guys and Gale banks in a video together. That would be the dream team.

If you told me this video was 10$ to watch I would have paid it with my eyes closed! So much useful informations!!! Thanks guys!

We need a 4 - 5 - 6 hour long special with all you guys.

After over 35 years in the automotive service industry, with 10 years with Porsche and 25+ years in my own foreign car shop, I have lived by and preached that maintenance is the key to longevity. Mt automotive experiences and love came from my teenage years in the 60s when we built and dropped V8s into everything. Building hot rods, either for ourselves or others, is what kept us out of trouble. After that, I enlisted in the Navy and was designated an Engineman. That's where my diesel experience started. When I got out, Porsche was the only manufacturer that offered me a decent job. My career choice helped me become a millionaire. I'm "retired" now and this video was extremely interesting and memory-producing, thanks! In regards to detergent fuels, Costco is one of the only places that carries Tier 1 detergent fuel.

This was hands down, one of the best videos I have ever seen on KZfaq

I did oil analysis all the time on my Freightliner. One time it picked up a lot of potassium which they use as road salt around here. After looking around I discovered the shop left a turbo intake clamp loose, so it was sucking in road spray. Without oil analysis I would have went all winter without knowing, leading to the engine getting dusted and worn out.

Outstanding episode! Smart men listen to other smart men and guess what happens, we all benefit. What a great collab.

Ugh I LOVE videos like this. Sharing the knowledge that 99.9% of people don't know and a very small percentage of us CRAVE! I just need definitive sources like this I can point people to when they question what I say about oil. Really awesome conversation and lessons. Thank you!

Appreciate you guys taking the time to sit down and record the session. Great insight to the nuts and bolts of what matters to keeping an engine going for the long run. Keep up the awesome content!

It's amazing that Dave is so passionate about automotive maintenance & repair. Hope his boys keeps churning out more like grandpa!

Bringing Dave and Lake together is a dream come true. I had to re run this show a couple of times to let it sink in ( 66 year old retired railroad engineer ). Here in Australia I run BP premium 98 and diesel. Regular oil changes and filters. Yes I drive my vehicles

What a GREAT video! I have 2 associate degrees in Auto Tech and 27yrs as a line mechanic, now retired. I learned so much from this. This video should be required viewing for all line techs and motor heads!! Thank you DAC.

What a fascinating discusion. I just changed the oil on my little Fiat Panda. According to the user manual I didn't need to do it for another 2,000 miles. After listening to these guys I am so pleased that I did it early. The old oil was so black and watery it clearly needed changing. Thanks guys for sharing this with us all.

What an education! Thank you for taking the time and effort to video Lake's visit to your shop. Lake's knowledge is extremely important to getting better service out of our vehicles.

Oil analysis is something I learned about in Army Aviation over 25 years ago. All the numerous gear boxes, transmission and engine oils were sampled and sent off to the lab. Now I have engine oil analyzed annually and the transmission fluid checked every two years. It costs, but I want to know of problems early to either fix or trade before it gets to expensive. Too bad it's not offered by the dealers when you purchase their extended warranty.

Retired mechanic...outstanding job making such a comfortable relaxed and informative video. One of my favorite videos I’ve seen . Damn fun watching

So much humility and respect between these guys, it's awesome!

As a DYI mechanic, I just learned a ton and it has changed my PM schedules on all 3 vehicles right now including a 2012 civic with 225k. Thanks Dave!

I can listen to Lake anytime. Very smart man!!!

At 26.47 begins the most important (and infuriating) piece of vehicle information I have heard in at least a year. Thank you! What an awesome video.

This was an absolute GEM 💎 of a video !! Thanks everyone who participated in making this 👍

I feel so priviledged to have been able to listen to this information for free

if you dont watch total seals channel missing out on so much info. love how he touched on fuel being being the #1 killer for oil. Whenever Lake Speed talks, just know its going to be 💎💎

have been watching Lake's oil videos for a while now.. and for him to visit dave's shop is GOLD..

Man I've gotten myself humbled by watching this. Thank you for sharing your knowledge in such an understandable manner!

Thank you so much Dave for letting us watch these videos at 75 years old I have not stopped learning from the old school to the new school in Moore new school I still love to learn so keep up the great work I am an old Motorhead Gearhead dude from the past still looking into the future I really am thankful for what you're doing and I appreciate this guest that you have on this part of your interview so much to learn and there's even much more coming down the road thank you again for so much of what you do and what you offer may God continue to bless you and your family always. Amen

When I was in the army over thirty years ago, we had oil analysis intervals for our truck fleet for the company, it was part of the pmcs system,....preventative maintenance and check system.

Dave and Lake! Two of my favorite people to listen to talk about engine stuff! Well done fellas!

I could watch these guys talk all day. I love this channel as I always learn something. Never stop learning.

Lubrication specialist + Dave and his boys = Amazing content! Great collab! you all could lay information on us for hours! Wish we could get some more!

Excellent video. Thanks for sharing. I always change my oil 3 to 5k intervals. Interestingly that's when the GM computer on multiple LS motors also believes it should be. If you want to drive to 300k miles and beyond on your original engine, then change the oil!

This is an outstanding conversation among professionals. Everyone in the room is an artist !

I learned something very interesting in this video, I've been doing my oil change intervals WRONG, been pushing 7,500-10,000 miles because the oil jug stated that, I'll have to re-learn this, Good stuff in this video, Thanks to your guest Dave

I wish I could hit the like button multiple times. I always learn something from both of you but I also get confirmation on things I have been preaching for years. Thanks

This is one of the most Piston Head videos I’ve seen in quite a while. LOL! I love it! Thank you all.

The most informative content on oil, gas, diesel fuel that I have ever heard. Lake Speed, Jr along with Dave's crew helped me to understand so much, thank you!

I always learn from watching this channel but I have never learned so much so quickly. Thanks so much for having this TedTalk with Lake Speed Jr.; he is riveting to listen to. Highly approve.

I’d love to see more in-depth discussion from Lake about how fuel additives helps prevent carbon on GDI engines and what he thinks of top tier gas

Another super video. I enjoyed how it was filmed like we the viewers were included in an informal, but great informative discussion. I hope Lake comes by again.

Thank you for including us with you in this huge informative seminar. Love your information that you and your crew offer!

My old man did oil testing for MANY large engine oil companies back in the mid 70's and the stuff he would tell me about, engine oil, rings, pistons, wearing, etc, all that, sound JUST like this oil guy talking. So I guess my old (now 78 year old) man was correct after all these years and to think, he had no formal training, just learned about it through testing and deductive reasoning. It's nice to hear guys like this talk, you just learn SO much from them!

Lake Speed Jr & Sr are both awesome

WOW. That is all I can say. I have NO formal training in mechanics but I understood just about all of that. I did not know most of it but understood it. I really wish some of my friends and family would watch this channel.

This was awesome!!! Please keep inviting pros like this to your shop to "talk shop". The knowledge he shared is incredible!! Thank you thank you thank you!!!

Two motorheads totally geeking out over cars. Absolute joy on camera.

Great video! As a fleet manager now oil representative i found this really rewarding. many of Lakes positions on lubricants I am in total agreement with and have been practicing for years. It is refreshing to hear it from someone beside me! I have seen Lakes videos before and this one was especially rewarding because he wasn't pitching a particular brand as much he was discussing the industry issues . I really like your channel Dave i ran my own shop and had many similar thoughts. Its unfortunate that until recently the homogenization of ground transport didn't encourage much thought

As a retired cotton topped tech and shop owner since I was 10 years old you never quit learning in automotive. Fascinating stuff. We also had at our disposal a lubrication specialist of many years. We could call Dave and he rarely needed to consult a computer. He had a memory beyond belief and a passion similar to Lake's. He retired about two years ago as I did which is too bad for our industry. Love automotive KZfaq shows of which your on top. Tanning in Tucson.

I've been tracking oil for a fleet for years and endorse everything here. I would add a few lessons shared with our new techs (because they do not get taught this in the schools either) - first is to fight the owner desire to extend drain intervals unless backed by the science - second is to use the best oil you can afford - third is to think of oil as the engine garbage can and that it has to go. Those last two are the important ones for longevity - an engine can have a blowby problem, or a micro coolant leak and still survive if the oil is changed frequently enough. It can be helped to the next overhaul interval instead of being run to the ground and out of service early. When we added telematics and started tracking the oil pressure, we were also able to watch fuel dilution in progress. We would see fuel in oil (often high oil levels it was so bad), but diagnosis was hit or miss depending on the tech. Oil analysis was always an oil drain or sample too late though, but when we plotted pressure we could see the point about 2 weeks later where it finally dropped. We learned a few things - first the unit did not need to be killed from service immediately - significant to the operations team - and we could use that second week to anticipate the severity (bad injector vs bad blowby vs over regen) and take a few days to review the other data and target our diagnosis. Lots of bad DPFs were found plugged with coolant residues because of cracks in EGRs for example. That burnt coolant residue was also elevating potassium and those nodules were scoring the cylinders too. Oil analysis would track that too. I used to say my job was paid for by the engines I saved. Oil analysis was essential to that capability. Lots of resistance from management - oil and filters are seen as optional, analysis costs money, analysis of results costs money, some times analysis is wrong and they don't undersrand the value of training through mistakes. But it does work.

Hey I am from Norway and just wanna say its soo nice too hear really good conversation and @dave`s auto center you are great

This is one of the most informative videos I've watched in a long, long time. It was 30 minutes well spent nerding out on oil.

Lake is really cool he definitely knows what's going on. Excellent show you guys have it, that's for sure. We'll deserved.

This was not only very entertaining to watch, but extremely educational as well. Thank you for sharing with us.

Saw Lake Speed Jr. at a seminar in Carlisle Pa. Whn he was with Gibbs. What he said about why it is bad to just add stuff to shelf oil made sense and stuck with me. Have listened to what he has had to say since.

I agree with your oil change recommendation 100% I change mine every 5000km’s because my daily driver Infiniti SUV calls for every 10,000km’s intervals. I also agree with Lake’s comment about Porsche owners not driving their cars, however that doesn’t apply to me, because I have 250,000 km’s on my 1985 Porsche. And the engine hasn’t been apart yet. I actually sent Lake Speed Jr a question on the oil I’m using in my Porsche and he responded to me within hours. He’s a smart cookie. Awesome video as usual Dave, thanks for sharing with us 👍👍 To anyone reading my comment let’s not forget about the miles vs kilometres. We are using kilometres in Canada

This is the crossover we needed

I’m absolutely fascinated by this stuff. I can’t say there’s a time I’ve watched a DAC video and not learned something. Thank you for all you do!

This has beeen by far, besides diagnostic training, the best 20 minutes of information for anyone in this field or any oil lubricated industry. This video is an absolute GEM, which makes me a proud Daves Auto subscriber, and OilGeek as well......just priceless

That was so good to hear all that information, I change oil in my van and car every 5000 or sooner !! And always before going on long trips!! Love your channel❤

I have been watching lake speed junior on you tube for a while. He is one smart guy. Love it!

I've met Lake before. This guy is the real deal, and it doesn't hurt that he's super nice.

We NEVER stop learning!! Awesome to see great minds sharing knowledge for the benefit of everyone! I will be sharing this video with many of my friends and customers. Maintenance costs less than repair!!

I could watch this stuff all night.

As an owner of an old 7.3 IDI I can confirm that even with an electric fuel system that’s air tight, new injectors and the IP timed right my IDI won’t run right without a quart of atf in the fuel. It’ll start weird, & have issues starting. I can also tell that if fuel is older it’ll take longer to start. Here in the US we have crappy fuel quality. I got a bad batch of fuel at a fuel station one time, & later down the road 10 miles the truck stalled. Coasted into a gas station and found my fuel pump Pre-screen was plugged. Cleaned it out, bled the fuel and within 10 min I was running again.

I've done NDT for years and that crack is exactly in the direction you would expect to see one that comes from manufacturing process. MPI often called Magnaflux testing should have found this initially but that doesn't help the current owner. NDT is an amazing career that is used from pipelines to spacecraft, tight tolerance motor parts to giant pinion and drive gears. Great example of a inherent discontinuity. Love the channel.

Knowledge is power. Thank you for bringing in the experts. I change my oil every 5000 miles. Your videos are great. If I am ever in Utah I would like to stop by .

That was great. Oil is cheap engines are expensive is what I was taught. Bought my first brand new truck in 1987 just out of high school, Ford Bronco with 302, first oil change at 1000k, 3000k after that. sold 10 years later with 180k still ran like new and never touched engine other external components. All Toyotas now and change oil 3k first/new and then every 5k. Brother in law says his new Volvo only needs every 10k so cheaper maintenance. We'll see how long it lasts.

I had a Porsche 911S that ran Great, if I ran the H out of it. Original owner, ran it daily on the Autobahn. This is the BEST engine oil video ever!

Back in the day (before synthetic oils) the recommendation was to change oil every 1,000 miles and the filter every other oil change. It didn't take long for "car guys" to realize that when you didn't change filters, you left about a half quart of dirty oil in the engine. On the other hand, when synthetics first became popular, some companies recommended changing only the filter every 2-3,000 miles and topping off the oil level. Doing anything besides an oil AND filter change is jumping over dollar bills to pick up pennies. Regular oil and filter changes are the best insurance you can get for long engine life.

I had a smile on my face just watching this and learning so much.

Lake is the man loved watching his dad race back in the day !

My question is now, why does companies like amsoil recommend up 25k mile oil change intervals? Surely they have testing and data to back their claims, at least in certain scenarios?

What a great collab! Been watching Lake for a long time... learned so much and now even more in this video with the great questions. When I first discovered Lake, his video reaffirmed by strict usage of Pennzoil Platinum (started using at 90k and now 212,000 and counting in an LS w/DOD (disabled, but parts still there)!).

Thanks for sharing. I’ve been following Lake since I seen his videos with Stapleton 42 on KZfaq. He’s very knowledgeable and smart just like his dad. I’ve learned a lot from him even though it makes my head hurt.😀👍

WOW, That was a master class. Now if you excuse me, I'm going to get my oil changed.

One of the best Daves Automotive videos. Ends all the know it alls sealed for life no need to change the oil, extended oil change intervals. Great job.

Dave, That was an absolutely amazing round table discussion you had with Mr. Lake Speed! I'll probably watch this again to make sure I fully understand the plethora of knowledge bestowed on me just know.

Two of the few guys, this senior admires & respects.👍🇺🇸

I work for a commercial farm, and I couldn't believe that some of these trucks were still running with engine oil that has been in the engine for Years...I mean chunky style "coal tar"..( Early 2000's GM V-8 products) ..so I drain them and do thin oil with Seafoam to wash them out then new filter & factory spec oil...and I'm so impressed with these "newer " units, oh why did GM go to such a small oil filter? They are the size of a 20hp Kohler oil filter...but im totally impressed on how these units hang on without real attention, .thanks for the tech info here Gentilemen.

Wow, what a video. A video that every engine mechanic needs to watch. If they think they are a good mechanic now, after watching the video, they will become a much better mechanic. So much knowledge to soak in. Great meeting Dave, keep up the good work. Just love your video's, glad I found your channel.

To me, the conversation was so exciting. To hear experienced experts talk about engines and engine oil. Thank you!!

I could listen to these guys for hours. A ton of useful information for my Diesel TDI

This is awesome Dave, this speaks incredible volumes to you as well as your shops humility to learn and constantly improve upon your services and products. Thank you for not shying away from your faith when so many on the internet do and teaching a young twenty year old man from western NC, 28040.

Take notes folks. All I heard is real people here vs corporate America trying to take your money and play the system.

Dave!!! Your transparency as a business man is honest and fantastic. You are a true mentor of how a business owner and sales should be. Good job 👏

Man-Oh_man! I enjoyed watching you guys sitting around, talking moto-geek stuff so much! I have been following Lake for a long time now and learned a lot from him, but seeing you guys talk about how the oil actually fits into the scheme of things, especially as an engine builder, was just really remarkable. I hope to see more of this kind of shop talk with others that are "Best in Class" of what they do. Lake was a really good choice and guest. Thanks again!

I started watching your channel 2 or 3 months ago i have learned a lot and I'm sure many others have to. I just want to say thank you very much You all are 100 percent professional God Bless you all

Great and highly informative video. Used to rebuild motors and hearing how the additives actually work from a guy who designs them is something I wish I knew more about back in the day.

Best channel on KZfaq regarding autos, so glad I found it. You guys are the best, and honest. Thank you.

Fantastic video guys! I have worked with a high end manufacturer for 37 years and you guys are spot on!! You men made some great tips I wish more vehicle owners knew, especially about oil change intervals and pampering your engine too much. This seems to be even more important now than with older engines without direct injection, turbos, etc..This applies to both diesel and gasoline engines. Thank you for making these great videos!!