So have you figured the actual MPG your getting? How much is gas where you live? I have heard alot of poeple say that they get 28-30 mpg in their 2.3's but I only average 21.5, and my car runs like a top and doesnt have any codes etc. Thats just at 300 miles per tank if I run it pretty much dry. and it takes about $25 to fill it at $1.90/gal.