Just filled up and got 18.35 combined with Comp on 2x5.

 

I would say 18 mpg is probably a national average...auto/manual...3.55/4.10...etc. But not including towing!

My last 1,000 mile test came out to 17.8 mpg.

That's rural living (no daily gridlock) and 25% at gross weight (but almost no towing).

RJ

 

I didnt buy for mpg anyway. It is just a perk.

 

Recently Made A 350 Mile Round Trip U-haul Car Trailer Hooked On.averaged 18.5 I'm All Stock

 

For a good running (stock) and empty truck I would say the average is about 17-18 MPG.

Like I'm finding out driving style has a lot to do with it. I'm now pushing 20.37 MPG with only the mod's in my signature.

If you got a jake... Make sure to clean your MAP and IAT sensor often...

 

15mpg city on the last tank! I'm pretty disappointed

 

Just came back from idaho Falls, and did 21 mpg. My setup is below with comp on 2.

 

I just switched out my tranny fluid and rear oil to synthetic after 64k (Amsoil) and the comp is saying I'm getting better. Was 18.1 now it's 18.3 and rising. I don't have enough miles on this tank to do the manual calc but the last 3 times I've done manual vs comp the numbers were within a tenth which for me is more then I trust my math.

It'll take a lot of miles to pay the difference in cost of synth over plain old mineral oil prices but if the milage is going up then I hope the wear is going down and that "could" save me big bucks.

 

I get about 15 around town, 17 highway, don't have the overhead. The auto & 4*4 combined hurts the most. My dad has a 2wd with the auto & 4.10's & he still gets 18-19 around town. But compared to a 360 or v-10, I assume this is pretty decent. No gas motor will get this in a 3/4 or 1 ton.

 

i dont know why yall get below 20 mpg... are yall in some hilly areas?......im on the eastern coast where there is no hills and before i modded the truck i got 15-17 MPG and now she gets 20-24 range on the highway.......

 

Yes I live in a very hilly/mountainous area. Also you get such good mileage cause your truck is light in weight and is 2wd and doesn’t sit much higher than my Honda Accord. Sure would be fun to take a spin in that "truck" of yours.

 

It seems every one is getter better than I am...

I get like 13-15??? What did I do wrong?

 

Newer vehicles the engine is not as broken in, It seems that the common rails don't get as good milage as the ISB's which aren't quite as good as the 12v.

How heavy is your right foot? Drive over 70? That will kill milage.

 

Set your cruise for 55-65 MPH and don't touch it...

55 MPH = 20-21 MPG
65 MPH = 17-18 MPG

Clean you sensors IAT & MAP it will help...

Change Air and Fuel Filters...

 

If it makes you feel better my friend gets 7 towing his 8000# Kubota with his Duramax...