Originally Posted by BLND1
Are you trying to say that the euro specs are better than d1g2?
That is EXACTLY what I am saying. German oil specs are tougher to pass than dexos1.
Usually dexos1 is plenty good enough, and it certainly beats any other U.S. or Asian engine spec.
If towing-hauling, which is the market Rotella Gas Truck is supposed to target, someone looking for more performance, they should consider German spec oils, basically for when the heat, high revs, racing, towing, etc. is the duty cycle.
It very well could be that the upper-tier dexos1 oils (M1 EP, AP, and Castrol gold bottle) might be about as good as the German spec oils. We don't know that since they've never passed all the tough German specs.
That said, here is what we do know: German oil specs are unrivaled. You want great oil for a tough duty cycle, they are available.
Take a look at the tests they put the Germain oils through:
https://www.aftonchemical.com/Afton/media/PdfFiles/Specification_Handbook.pdf
... or, if you don't want to read all that, take a look at:
https://www.youtube.com/watch?v=fv53RbvgfGc for Porsche, and they are similar to Mercedes & BMW demands.