M1 FS 0W-40, M1 FS 5W-40, D1 ESP 5W-40 Volatility Results - March 2025

[JD!]

Amazing information, thank you for publishing your test results.

If you're taking suggestions, it would be interesting to see how the Mobil ESP line stacks up against these oils. Cheers!

 

[JAG]

If you're taking suggestions, it would be interesting to see how the Mobil ESP line stacks up against these oils. Cheers!

Thank you. Good news is that due to a BITOG member very recently sending M1 5W-30 ESP, I will be testing that next. I have also been testing some HPL oils since late 2024, but I have not been posting the results for several reasons.

 

[ARH_0700]

Thank you. Good news is that due to a BITOG member very recently sending M1 5W-30 ESP, I will be testing that next. I have also been testing some HPL oils since late 2024, but I have not been posting the results for several reasons.

Looking forward to those results. I have some M1 ESP 0W-30 if needed for comparison.

 

[JAG]

Looking forward to those results. I have some M1 ESP 0W-30 if needed for comparison.

That would great. Thank you. Perfect testing companion to its 5W-30 brother. Please let me know if you need my address again.

 

[JD!]

Thank you. Good news is that due to a BITOG member very recently sending M1 5W-30 ESP, I will be testing that next. I have also been testing some HPL oils since late 2024, but I have not been posting the results for several reasons.

Great! I've been using 5w-30 ESP in all of my vehicles as of late, so I really look forward to hearing about it.

 

[JAG]

Here is a picture of the cups after wiping them with rubbing alcohol. I have to sand the varnish off before the next test occurs.

 

[OilUzer]

After ending the test, I poured virgin oil into each cup and they sat until this morning. I stirred the mixtures, then drained the oils. The two M1 oils have a lot of insolubles left behind, while QS Ultimate Durability 10W-30 has almost none. The pictures are not as revealing as my eyes are. M1 0W-40 FS has roughly twice as much insolubles volume as M1 5W-40 FS does. The difference in amount of insolubles between the two M1 oils and QS UD is huge. I did not include a picture of D1 5W-40 ESP because it was not tested as long as the others, but the amount of insolubles is similar to what QS UD’s cup has.

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I did some tests in old days torching different oil in aluminum cups ... it was for fun and I don't recall the results. I think I posted it here.

Based on your test, 10W-30 did well. I have a feeling M1 EP 10W-30 may win this test.

 

[JAG]

Good 10W-30 synthetic oils do tend to have very little VII or even none and the base oils are relatively viscous, which leads to low volatility. M1 10W-30 EP probably has fairly low volatility but I expect it to be considerably higher than QS UD 10W-30. Same is true for almost every oil. That QS oil has crazy low volatility. Sadly it is extinct. QS UD became QS UP, and they don’t make it in 10W-30. QS UP oils do have very low volatility for their viscosity grades. I tested some of them and have a thread about it.