are any of these fuel injector cleaners any good seafoam, stp, etc..

 

THis is rumored to be the best: http://www.trademotion.com/partlocat...catalogid=3329

and then there's "techron fuel injector cleaner" which i have used myself with positive results.

Also, check to see if you're throwing a knock sensor code. (which affects MPGs depending on which gas you're using)

 

Slow down.