To get that great Royal Purple feel in the seat of your pants new get up and go, it needs their "Synerlec" technology built in. If it has it, it is on the front of the bottle. Their API licensed oils do not have Synerlec. You would need to buy their HPS (High Performance Street) or racing line to get the Synerlec. Pretty pricey oil, but decent. You can get it off of Amazon or at Summit Racing. Some of your big parts retailers can order it in for you but the price is much higher say at O'Riley's than at Amazon.