ive heard good things on the rotella, but nvr seen a blackstone test on it. B you dont have to change the oil every 1k, if ur worried about it, send a sample of ur oil to blackstone at 1k and 3k/5k intervals and see what they say (depending on ur riding style, amount of trackdays, etc) I ran the repsol semi-syth. for 3k and by the time i got close to 3k my bike seemed to shift very differently, almost rough, but it could have just been me. Soon as I swapped in amsoil, it was night and day difference.