So I got a 95 Chevrolet, stock tbi motor with the mpfi system. Most have seen my posts lol sorry for being annoying. anyways my question is fuel octane ratings, what’s the highest I can run or the recommended amount to run safely. Also what about e85?(just wondering lol) I have also just got my buddies weekend race rod going and smelled the sweet smell of race gas. Is there anyway I could replicate this smell with a fuel additive or an octane booster or different fuel safely in my ole truck on the daily? I Know it sounds dumb hahaha maybe I am dumb, but come on. Everyone loves the smell of race gas.