For all you non believers, go to RP's site. They have like 10 test done by independent company's, and dyno shops ect, and have proven that their oil to top notch ****. Its 7buks for a quart. not deadly expensive. Its like anything else, you get what you pay for. Higher priced oil with proven performance gains, reduced friction, a better heat transfer, and longer oil change intervals wuts not to go wrong. You can go 8k running royal purp and be fine. Thats well worth the price. even if you use napp oil, you sill are paying the same price if you think about it.

P.s. dont add Lucas oil addtives to you car. **** makes foam....