How many miles from a full tank?

[craigix]

I was just wondering what fellow 7.4 and 8.1 litre owners have got from a full tank, best and worst.

I have a full size dually and just got 170miles from a full tank! I think i'll have to take the lead out my boots and give her a service!

Whats the best anyone has got? I'm thinking of driving real lite for a tankfull and seeing how it goes. Problem is all i do is city driving up and down hills

-Craig

[bigoly]

hi i have an 03 2500hd with 8.1 shotbed so i only have 26 gallon tank dont get much past 220mi city driving before looking for gas station. but have got as much as 300mi highway running dry.
i have 3:73 rearend i belive the 3500 come with 4.10 gears im sure that makes big differance

[Silverado Brethern]

oh man 220 sounds really good to me. i have a 1500 with a 350 and 26 gallon tank rarely ever gets me over 225.

[craigix]

Hey some interesting news here, i've been driving her real soft, not really going over 1500rpm if i can help it and from a quarter tank i've got just over 80 miles!

This might get me 320-330 miles city driving (average speed about 11mph). I've also kept the tail gate open while trying this, not sure if it makes much of a diffrence but some people swear by it.

If I can keep this up for the rest of the week i'll post what I managed to get, i'm pretty pleased and suprised so far.

-Craig

[Silverado Brethern]

yeh....common logic would tell ya the less you push the accelerator the less gas you burn. and puttin the tailgate down isnt all false, it'll prolly get you an additional 5 miles out of a tank. To really get decent mpg gains get a free flowing intake and exhuast, air in air out.

[craigix]

Yeah its obvious, but its fun seeing just how much is possible, people keep asking me whats the best it can get and i'm planning to find out, I already have a free flowing intake etc. could do with getting a full service though.

-Craig

[Silverado Brethern]

Good to try just to experiment but dont make a habit of it because sooner or later tryin to see how much you get out of a tank of gas will cost you a new fuel pump, especially if ur truck has some miles on it. The only thing that cools a pump and keeps it from overheating, only takes once for them to burn up, is the gas in the tank. I rarely ever let mine get much lower than a 1/4 tank if its handy to fill up.

[Daci]

I have a 1500 350 5.7 V8 and I got the throttle body spacer , Flowmaster exhaust and K&N filter( just the filter) and I am getting like 14 mpgI just got the cold air intake. I will install it tonight and then will test whats my new mpg. It supose to be better.I will let you guys know