try seafoaming the engine. do a search, theres plenty of info on it..

 

My 2001 4.7L 2WD A/T used to get 15~16MPGaveragerbefore. After some mods, now I am gettiner 20~21MPG average. My driving isapproximately 75%hwy/ 25% city.
> Twin air intake
> Free flowingexhaust
> Superchip
>Bed cover
I did the mod one by one and the exhaust and the Superchip made the most improvement.

 

I've had my truck drop mileage and it hurts. These trucks initially have bad fuel mileage, but if it drops from there it stinks.
The main things that have killed my mileage are a bad water pump and (at a different time) a bad fan clutch. And winter fuel kills it too. I'm glad that it's about time to switch back to summer blend!

 

mine has a fan clutch that squeels a bit, im pretty sure its ****ed. maybe its time for a new one. didnt ever take that into consideration


Chad

 

Another thing you can consider is spending 100-150 bucks and hookin up an electric fan... that alone will get you 20+ horse power and will help with gas milage being as your engine doesnt have to turn that heavy *** fan

 

20 hp?[>:]

i dont know if it would be 20 HP but it will definatly free up some power , i agree.