Hey man, check that air filter, cause 5.4'ws are sensitive to mix. Each time I swap in a new, about once a year, the mileage creeps up some. And, run the tire at the highes recommended pressure for the tire, not what the sticker says on the door column. My van says 41 psi front and back, and my Michelins allow up to 50 PSI max, cold pressure, so I run them all at 45-47, vs the sticker 41. Handles better, and mileage again creeps up some.
Try reseting that mpg guage. Then take it on a good long drive, remember it's average what's in its data bank.



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