If you look at the Australian oil tests with the Timken bearing,two dino oils (Valvoline and Pennzoil GT) beat out all the others,except for RP and Penrite,which did the best. I think Penrite had the smallest wear scar and beat RP. As for the price,RP`s actually the cheapest synthetic on the market. At $8.99,it`s a couple of bucks cheaper than Amsoil and Redline.