Originally Posted By: Xstang
"regular" Mobil 1 is a mix of Group II/IV basestocks, and a completely different additive package. I couldn't find a VOA on m1 5w-30 done in the last year, but here is one on their 5w-30 "EP" oil:
Are you sure "regular" Mobil 1 isnt primarily a mix of GIII/IV?
First Ive heard of GII.