The truth about oil change intervals and analysis

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.

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.

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

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

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.

40 plus years a mech and this video was mesmerising!

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

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!

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 Youtube

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.

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!

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.

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!

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

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!

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