I got an average of 22.5+ mpg on a tank of gas driving mostly on the highway at around 55-65mph carrying a refrigerator and other stuff on half the trip. Also the same MPG on another highway trip. Both trips included a stop for a few days, so it had a cold start which eats some fuel. The trip odometer hit 525 miles on the standard size fuel tank, yet the low fuel warning didn't go off. The truck is a 05' 2wd, long bed, reg cab, 4.6 auto with 3.55 rear gears with about 11K miles.

I wonder how high the MPG would be if there was no stop, straight driving at 55mph on near level roads? Anyone getting better than 22.5?

 

Personal best is 19.1 mpg all highway through NC/SC flatlands driving 55-75mph. This is a 4x4 Screw 5.4 3.73 gears and 18" tires/wheels loaded with luggage and 2 passengers. oh, and with Airaid intake and Magnaflow catback if that really matters...

 

I've never seen over 12 mpg.

 

me too...but I only have 600~ miles on the truck... should I expect an increase in milage anytime soon or what?

 

I dont think so man cause I am approaching 7k and I have an xcal2 and that really hasnt helped any (I am always driving it like I stole it though).

 

Yeah yeah thats the ticket. It will get better and your checks in the mail! (just razzin ya bud )

 

I've averaged a best of approx. 21 mpg on a highway cruise at 55-60 mph going to and from work. 4x2 Supercab, 5.4, 3.55 limited slip rear.

 

On a pure hwy trip I got around 18 on my truck when it was bone stock. Best around town is 14. First tank of gas with headers and X2, I got just over 14 around town and expecting it to go up more considering I was playing with it like a new toy

 

My best is 19.6 on a 300 mile all highway trip going 65-75 mph. 4x4 SCrew with5.4 and 3.73 carrying 3 adults and 2 kids. Only mod is a K&N drop-in filter, and the engine wasn't even broken in yet. I drove like a granny though.

 

First tank was 14 mpg. That included ~300 km trip with 30 bales of hay on the return leg (120 kph there and 80-90 kph back). '05 SCrew 4x4. The current tank is mostly around town and driving like a granny...guess we'll see.

 

Man, what do you do to get your mileage so low? Full gas starts and full brake stops?

I was really happy with my '01 4.6l w/5 speed manual that got between 16 and 20. I just got back from a 500mi round trip in my new '05 and averaged 17.5. That's with an open bed hauling a piano. Can't wait to see the mileage when I add a canopy. That added 1 to 2 mpg on my '01.

I'm averaging 16-17 in my daily commute - 1/2 city, 1/2 highway.

Yeah, I guess I drive like a granny...

 

Like I said before, I drive it like I stole it, no babying here. Also I am always in stop and go traffic, I think I was 13 the last time I had seen open Highways here in Miami.... I am realing being sarcastic.

 

My best is 17.8 mpg but thats with my Nitto TGs too.

 

20.3 here

 

15MPG going 80 even to jacksonville and back from tallahassee...

Supercrew 4x4 3.73LS

-stephen