Quote Originally Posted by preferredduck View Post
there is a difference i know for sure. 92 octane has a higher octane rating and has more energy than 87 octane. typically you use premium in high compression motors because there is not alot of room for compustion to take place. my SI runs premium only and if i don't it runs like crap and i get way less gas mileage. stick with what your call cars for, it it is designed to run on 87 octane then that is all you use. i bet alot of people with
VTAKK swaps don't put premium in their cars.

it does not add power or make you go faster you actuakky kose HP and MPG.
thats what i was trying to say lol!! reps

and fixed as well