220 usually...240 last race on July 21 in Pittsburgh...ambient temps were up there and we were really running the motor hard, redline on every shift. Got 2nd in class though !
220 usually...240 last race on July 21 in Pittsburgh...ambient temps were up there and we were really running the motor hard, redline on every shift. Got 2nd in class though !!
An XOM engineer told me that the SP formulas of 0W-40 FS and X2 5W-50 have compatible base oils and the exact same additive package, so you can mix them in any ratio to taste and produce a higher HTHS than the 0W-40 alone if needed.