I Just started using Rotella 15w40 dino, without any issues. I spent hours researching this oil, and found a lot of good info at www.bobistheoilguy.com You will find a lot of happy bikers that use it, and our happy with the results. Also, check out this link from the Shell website. They have a TL 1000 owner who races his bike, using Rotella. Look how clean his motor is after 65k. http://www.shellusserver.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=3081&page=1#Post3081