I have completed the following mods (Deckplate, Trueflow filter, ISR mod, Seafoam, and MAF cleaning) and have been tracking my mpg. I have been averaging roughly 17 mpgs (zero out my trip odometer, divide miles/gallons of gas). I did not notice any cumulative effects from all of the mods UNTIL, I cleaned my MAF sensor. It was dirty, and the electronic 'connector' was somewhat loose due to a bug of some sort. Anyway, I have noticed an increase in gas mileage to 18.6 mpgs since the cleaning . This mileage includes same amount of city driving, using ac, and towing a trailer with a riding lawn mower . How often do all of you clean your MAF sensors?