My bike was pretty much 100% loyal to me last season as far as the motor is concerned. At near 10 bucks a quart for that HP4M stuff and another 6 bucks for the HP Tranny oil...I'm sick of 15-20 dollar oil changes. I was at AutoZone today, and really hate some of their stuff in that store, but they sell cases upon cases of Castrol GTX, MOBIL 1, all sorts of racing oils. Whats the best, most affordable oil, that I can buy a case of, and have it last me a little while??