best way to improve gas milage on 5.4L?
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For your model, - you better read this, from Ford -
http://ww2.justanswer.com/uploads/ti...call_07M08.pdf
http://ww2.justanswer.com/uploads/ti...call_07M08.pdf
#7
I have a gryphon and it has a base tune.. It improved my mileage but only because it allowed me to correct the tire size for calculations really. The base tune only improve shifts the 2nd is a tow tune the third is a performance 93 tune. I dont really think they do much for gas mileage. I like it though.
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