I have a 2013 M5 with the S63TU engine (a "hot v" TT V8), a stage 1 tune, and high-flow cats. It does 6-7500 mi/yr and 4-8 track days per year. I'd like to go with an HPL 40 weight, but I'm unclear whether I should choose the euro, regular PCMO, or the new NO VII. the price isn't a particular concern between these, so long as it's worth it.
I live in Michigan, but the car is garage kept and not driven in winter. Any recommendations between these three?
I live in Michigan, but the car is garage kept and not driven in winter. Any recommendations between these three?
Last edited by a moderator: