from another forum....

Quote Originally Posted by Metro
Using regular 87 octane, it will cost me $142.19 per month in fuel over 2200 miles.
Using premium 93 octane, it will cost me $133.08 per month in fuel over 2200 miles.

from what i have looked up this morning i think it depends on the vehicle itself. like many people have said if you car wasnt built for 93 oct it wont make you car faster LOL but it could save you alittle money or break even for cleaner gas that will make your car run better.