Originally Posted by Nismoracer

Went to the blackstone site. Seems they do analysis of oil on a particular vehicle to determine what's wrong with your engine. It doesn't show tests of oils and which is the best, just analysis of your set up to determine what's happening to your engine. If you look up best oils, mobil 1 pops up everywhere but then you see best synthetic oil and Royal Purple pops up everywhere. Stick n with Royal Purple along with their filter. Look at how the filter is made and judge for yourself. You gain power just from swapping out your oil, tranny and differential fluids. And the fluid change interval period is longer as well.