Re: Royal purple questions
My engine ran much rougher and louder using RP; I even used it for 3 oil changes before changing to Valvoline synpower, and the engine runs far smoother and quieter now. I would never reccomend RP for any modern engine after my experience. If it were any better than other oils, you would see at least one NASCAR, F1, Indy, ALMS, Rolex,,,team using it to gain any advantage, but not the case.
2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper AT3's, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.