Originally Posted By: 2015_PSD
Originally Posted By: Virtus_Probi
Why the heck would M1 HM, AFE, and EP have better high engine temp performance than plain ol M1??
Definitely a concern of mine with a turbo...
AFE and EP have more PAO than M1, but that does not explain M1HM (unless it does too).
Just 2 M1 and M1 AFE grades, not HM nor EP:
M1: 5W20, 5W30, 10W30, 0W40 ...
M1 AFE: 0W20 and 0W30
If there are M1 0W20 and 0W30 then AFE are special, as I see it they are just marketing ploy of Mobil.