[JSPERFORMANCE]

When we were trying new oils (after Mobil one changed their formula) I researched Royal Purple and used it myself. I found that it broke down alot faster than the Amsoil and even some conventionals. It always came out very thin where the Amsoil seems to keep its viscosity alot better. In fact we recently changed the IROC over to the Amsoil Dominator race oil and the car picked up .2 and 2 mph. I was sceptical at first but there were no other changes made and the DA and temp were the same as some passes last year where the car was the .2 slower.. I dont know for sure if the oil did it but I am not gonna run anything else..