Gas Mileage 360

[angrybreadbox73]

hey yall this is joe im a former mechanic and now am a truck driver my beast hardly does 7.0mpg but it is true the slower you go the better you get i upgraded my exhaust and it improved also try usin royal purple motor oil and tranny fluid  but the key here to our mpg woes is getting the engine to breathe better a 4bbl helps and so does cold air induction