What logical ways are known to improve Gas Mileage?Have 02 5.4L 4wd avg 13-14 Hwy. Recently added Flowmaster catback
system, didnot seem to improve

 

of a big engine and heavy truck. I've got an '03 5.4L SCab FX4 that seems to get between 14-16. It's gonna take some gas to move that weight around, and I'm not sure you can do much about it

 

Since day one mine has averaged around 15 mpg mostly highway i am pushing 80,000 miles and still about the same.

2000 F150 5.4 4x4

 

I have a friend that gets up to 19 highway pulling a trailer with a 2002 Screw 4x4 & 5.4L

 

FWIW, my '97 Expy, 5.4L gets 16 mpg, hwy, downhill with a tailwind! I got 8-9 mpg last summer pulling my 19' travel trailer.

 

Try to watch how much you get into the throttle. Maintain all fluid levels, and try not to overrev the engine. Perhaps consider getting an open filter intake like the AF1 or K&N. These will help with horsepower and torque, as well as mileage if you keep out of the gas.

-Flea

 

Besides basic driving techiniques, fuel mileage improves with the following mods: open up the intake, exhaust, bed cover, and superchip.

 

Electric fans and the under drive pulleys will definitely help in the MPG department...

 

APT,, Thanks for your response.. Did some research on superchip
page, Am somewhat confused!! Have you done any mods you spoke of and what effect will mods have the chip application?

 

B as in B, S as in S...not buying it. I can't get that without a trailer and an empty box!

Tony

 

19 MPG's pulling a trailer??????? As stated above.....highly unlikely. Best I've ever gotten was 17 without trailer and with torneau cover, K&N FIPK, & Gibson Dual Exhaust.

 

I've noticed that during the winter months, My fuel economy Sucks! Once the weather warms up my milage gets better.

 

And the electric fans will help mileage too.

I have the poor man's intake mod which doesn't seem to do much, and a soft bed cover. There is a difference of about 1mpg when I have the cover on vs. off. My brother has a 97 5.4L and got a cap last fall and noticed about 1.5-2mpg on the highway better. I still have the stock exhaust and no superchip. Some day.... Freeing up the intake and exhaust will not only provide more power, but can improve mileage as long as you aren't always using that extra power.

It is winter now and the mid-west uses reformulated gasoline which does not have the energy content and we all get 1-2mpg less. My wife has been getting about 11mpg vs. 13 in the summer on the same type of driving. The best I have gotten was 16.5 at about 70-75mph highway speeds, no A/C, and the bed cover on. But I have a 5.4L with 3.73 gears. I get 15mpg at 80-90mph with an extra 2000lb of extra load - I cannot complain. It is a truck and does everything I ask of it with the only cost being gas.

 

Sell your truck and buy a Geo!

Keep the tires inflated to the proper pressure, and depending on what you are using your tuck for, you can change your rear end ratio.

Yeah, down hill in a hurricane with a tail wind!

 

There is only one proven known way:
Hook a trailer to it and have medic's friend drive it for you.