ViperPowa
Full Access Member
Anybody try Royal Purple 10w-40 in thier SRT-10 yet? Wondering how you like it since I'm thinking of going with this before racing this weekend. Seems the Mobile1 just breaks down too fast, or maybe it's just me. I know some guys are switching over to the Euro spec Pennzoil, but I dunno if I wanna go there yet. I was in between redline, RP, or just staying with the M1.