Just got an 08 6.4 fX4 and want to add mileage what should I do?

[Nosniknot]

Just got an 08 6.4 fX4 and want to add mileage what should I do?

[PolarBear]

For this and other performance related questions you'll have more luck getting responses if you post them in the General Discussion or Performance Parts section of the 6.4 forum. As for your question though, #1 would be to get rid of the DPF exhaust and get a tuner. Once you have done that the next most helpful thing is learning conservative driving techniques. With those things you will probably be looking at numbers in the high teens for mpg.

[smotrs]

Remember, City driving will kill your mileage no matter what you do. If you want higher mileage, stay on the highway, soon as you drop to city driving, you can just about watch your fuel gauge dropping.

[Nosniknot]

Thanks guys, as far as my driving style goes, I think I got that pretty much down, but what tuner do you suggest and what should I replace my stock exhaust with specifically?

[Clay Henry]

I get average 23-25 mpg highway with my setup...read it in my sig.

[TripleE44]

Originally Posted by Clay Henry

I get average 23-25 mpg highway with my setup...read it in my sig.

Me too, it says right there on my dash.

[Clay Henry]

Originally Posted by TripleE44

Me too, it says right there on my dash.

I hand calculated a 2000 miles roadtrip, 4 fillups all calculated.
The computer is olny off by 1 mpg on both my trucks.

[TripleE44]

Originally Posted by Clay Henry

I hand calculated a 2000 miles roadtrip, 4 fillups all calculated.
The computer is olny off by 1 mpg on both my trucks.

Are you sure you are remembering the mileage from your truck and not a Civic? Or that you didn't add 8 to your MPG after you hand calculated it?

I just have to try and pretend you are full of it for my own benefit. Because my dash is horribly off, and if I acknowledge you're telling the truth, the next time I fill up I may shed a tear...

Some trucks get great mileage and some don't for some crazy reason. There's another member on here that's getting worse mileage after the delete...

[smotrs]

If it's all highway and he was driving moderately, then I don't believe the 23-25 HC numbers are far off. Hell, I get around 18-19 if it's just Hwy station to station that's with a DPF and the Banks unit.

[tricktom1]

get rid of the dpf/cat and get a programmer