I have a 2001 SuperCrew 4X4 with a 5.4 in it. I just filled up today and recorded the highest M.P.G. I have ever had. About 6 months ago I put a SuperChip, Catback exhaust and an AirForce 1 on all at the same time. My mileage went from 14.6 to a high of 18.4. With the A/C on it dropped down into the low 17's throughout the summer. Since that time I've put electric fans, shift kit and an underdrive pulley set on. The weather has turned here the last week, cooler and a lot of rain. I haven't been running the A/C and I put on primarily road miles. I filled up today and had run 373 miles on 19.1 gallons. That figures out to be 19.5 M.P.G. I almost can't believe it but couldn't be happier.
Last edited by GearHead_1; 09-12-2002 at 04:14 PM.