i just used 100 octane tonight it was better. usually i feel the top end being much smoother, which is what happened. But i did hear its not that good to use that kind of octane all the time in your GSR. but i had 30 bucks to spend for a full tank
! i was drunk so i really wasnt driving but my girlfriend had a fun time with the 100 octane! haha dont worry shes a good driver!
