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The oil held up very well. Observations All oils shear with use; the rate accelerates sharply with temperature. That’s the key lesson—once bulk oil temp climbs, viscosity loss can snowball. On a stock-cooled engine, switching from 0W-20 to 5W-30 consistently raised water and oil temps by...

Okay—quick follow-up that confirms what we discussed: judge the oil by the data, not the logo. Recap Honda OEM oil appears to be Group III and is performing very well 0W-20 is running cooler than 5W-30 in the engine—especially helpful on a stock FL5 (no oil cooler, stock radiator, etc.). All...

Ok Fellas got some great news and feedback from Lake Speed Junior. I was right from all the Dyno testing they run - the 0W-20 runs cooler. I was wrong about Honda Ultimate possibly containing a PAO 1) Honda engine Oil is a Group 3 based product 2) Running a 0W-20 does let the engine run...

1) Factory Fill from Japan is made by Idemitsu 2) Honda Genuine “Ultimate Full Synthetic” is made by Phillips 66 Lubricants (formerly ConocoPhillips) for the American Honda in the U.S. According to Lake Speed Jr., most oil manufacturers work with largely the same base chemistries and additive...

You could be right. As an engineer who loves to experiment, I’ve learned that most ideas fail until the data gets validated by an expert. And you’re right — Lake Speed Jr. did show that the original ball bearing tests were flawed. This current experiment is just about validating...

Ok this got my attention! What the heck is this honda ultimate composed of? We know 80% of engine wear damage comes from cold starts. Usually group 3 engine oils are no where as good as group 4/5’s in extreme cold tests at -50c-30c. They can’t flow as well. PAOs / Ester base oils like...

Ah ha excellent observation. Very curious why Restore and Protect is better than Valvoline Advanced Ultra Maxlife which has supposedly Esters and the best protection? The high mileage version has more Ester. "Pennzoil has better form of Moly - Infinium Moly - which is the best form of Moly...

Interesting he's using Valvoline Restore and Protect 0W-20 - modified Type R. "This oil does a kill job of protecting the engine.." Anyone have any oil analysis on this.

It's not an approval, but it matches or exceeds the specs listed according to Redline Excited to see more data - let's go!

No idea ) Would be great for someone to test it - My understanding from that video is - the two highest grades of Motul motor oil is the Power 8100 ester and v300 double ester race oil - Mugen oil could be marketing - mineral oil based

Which Motul version? Mugen also has its own formulation.

This is great data - let's keep it coming ! Much appreciated !

The highest water temperature I logged was 221°F — you hit 240°F? Was that while running Mobil 1 5W-30? From what I understand, oil temperature readings can be misleading. The computer’s flow estimator often gets confused with thicker oil, and I’ve seen some reports of readings as high as...

Watch out with redline 5w-30 - it's not formulated to API SP specs - no LSPI protection for direct injection - only redline 0w-20 ( thickest 0W20 available at 9cst at 100c ) and 0w-30 is API SP formulated - check the stats - I talked to redline - they didn't have an API SP spec 5w-30 yet...

Excellent - Did you Run Log R - do have the Log R data? - water temps when you ran that oil on track, that would be excellent to understand what temps you are hitting with thicker oils on stock car! Many thanks! Keep the data coming!

0W-20 vs 5W-30 on Track – Real World FL5 Data There’s always debate about whether to stick with Honda’s recommended 0W-20 or go thicker with a 5W-30 for track use. We do know generally a 5w-30 can provide more protection, if it's the right formulation, but not always according to Lake Speed...

Floor and totally blanketing rear wheel arches helped a lot

Excellent - it's true the PUP 0W-20 starts about 8.8 CST with the virgin oil sample. Looks like they all sheer down at 1-2k miles of track use ~ 1 CST

Great feedback, thank you - curious the PUP 0W-20 you ran, in your opinion - how did it compare to the Honda 0W-20?

Excellent, data. Interesting results. I'm currently at 5-6ppm Aluminum as a baseline with the Honda Ultimate 0W-20, wondering is it maybe because I changed it more often originally, and that flushed out the break in wear metals faster? So far it seems the Motul API SP oils from the data show...