So, you also think that Mercedes is too nervous when they limited Noack up to 10%?Ed your fist sentence is a non sequitur. I agree there is heating through mechanical shear, but its not excessive.
250 is not 500. It is too severe and absolutely not representative of in situ conditions. IMHO.
Again much of the % off likely represents the NEEDED solvent carrier for the DP
But I am not on committee for SAE, ILSAC or API, Its just an engineering observation.
This sounds like a Concern looking hard for and actual Problem that doesn't exist.
I'll call it BITOG "nervousness"
This is intervention therapy - not a call out