just wanted to report i just swapped out my spark plugs for E3. after unplugging the battery cable and plugging it back in, i didnt see a change until a couple gas tanks, then after a while my car seemed to move easier and accelerate quicker. i decided to drive smart with gas instead of fast. i currently have 28.5MPG and about 2 gas tanks of miles(combination of city and highway). i used to only get 26.8MPG before with the old plugs.