ive always used mobil 1 motorsport in a cosworth engine---no problems/changed regularly thats the secret- even on a dry sump set up!!!!!--------everyone oil manufacturer wants to be the one you should use regarding oil!!! use mine -use mine-lol- how many users know what 15-50 means -or 0-40 etc etc means anyway, each year theres somethig new!!! pro thi pro that ----ha-ha- remember marathon bars!!!! then they gave us SNICKERS!! ARNT THESE NICE BETTER THAN MARATHONS !!!!!!!! RE INVENT!!! AND SOLD TO UNSUSPECTING CUSTOMERS!!-
how many oils on the market now ?????? if mountune build you an engine and say this or that -use it!!!! -thats me >>>>>gone ta-ta