I live in one of those areas were all we can get is Crap 91 octane Gas . I want to upgrade to a 2.6 pully ,and maybe a lower crank pully but was told i would have to run 93 gas or higher to make safe extra HP . Back to my question about Octane boosters. All i can get here is NOS booster which says it raises the octane of a tank of gas by 4 to 7 points . Would a can of this really boost a tank of 91 to 93 or higher so i can do some mods ?