Please help me increase my MPG

[mclean211]

I just bought a 2006 Ford F-350 Powerstroke extended cab short bed truck used from the Ford dealership. It's completely stock (63,000 miles on it) with the exception of a front end leveling kit and 35" tires.

When I bought it, I replaced the air filter, oil, and oil filer. I filled it with diesel and added the appropriate amount of Diesel Kleen as suggested to me by my brother who religiously uses it in his Powerstroke.

I made sure to run the first tank of diesel out without hauling or towing anything and to be very light footed with the accelerator. When I refilled it, I calculated the gas mileage by hand and was getting an average of 10.8 MPG.

This seems like very low MPG to me. My friends and family who own diesel trucks average about 50% better fuel economy. Some Fords, some Dodge...

I took it back to the dealership and they said nothing is wrong with it in any way but I don't trust them because they seem to have their own agenda.

Surely something must be wrong? Please help me get better Mileage. I've tried the normal things such as tire pressure.

Any suggestions would be greatly appreciated. I am very new to diesel ownership and a little worried as MPG is the reason I sold my gas truck.

Thank you,
McLean

[bwmtnbiker]

If I were you, i would delete the EGR, buy a turbo back exhaust, 4inch is fine. Then have your ECU, PCM, Trans and all that updated.

When you do that stuff, call vivian at quicktricksauto.com (or some other programmer if you dont wanna use vivian) and get some custom tunes written for your truck. The extra horse power will increase your mpg a lot. I'm averaging around 17city and it seems more on the highway. Hand calculated too.

All the things ive mentioned should definitely increase mpg as long as you are easy on the go pedal.

[bwmtnbiker]

Oh, when you get it flashed and updated at the dealer, have them re-calibrate your speedo too

[mclean211]

By the way, what type of mileage were you getting before those modifications?

[bwmtnbiker]

Originally Posted by mclean211

By the way, what type of mileage were you getting before those modifications?

I was averaging about 14.7 best was almost 18 (think my dad added a few gallons to the tank without telling me) and worst was 11.4ish.

[jesilvas]

Originally Posted by bwmtnbiker

Oh, when you get it flashed and updated at the dealer, have them re-calibrate your speedo too

Good point. Do you know if that has already been done or not?

[2003kingranch]

I have no idea what my truck got stock. I only drove it stock for 500 miles

In town I usually average 15. Highway 20 is pretty average. (Driving 55-60) I filled it up last night had 526 miles on the tank, put 27.4 gallons in it. Comes out to 19.2 mpg.
I'm running all my mods in my sig and Matt's SRL. High hp tunes get you great mileage. But only if you keep your foot out if it. Your mileage will drop quick. I'm on 265's btw.



Sent from my iPhone using Autoguide

[bwmtnbiker]

Originally Posted by 2003kingranch

I have no idea what my truck got stock. I only drove it stock for 500 miles

In town I usually average 15. Highway 20 is pretty average. (Driving 55-60) I filled it up last night had 526 miles on the tank, put 27.4 gallons in it. Comes out to 19.2 mpg.
Turns out wind has a lot to do with it. Some trips ice gotten 18-21


Sent from my iPhone using Autoguide

Yeah, according to my edge CTS, I average about 19, 20 on the way to gainesville yesterday. not 100%sure how accurate but we will find out soon lol

[2003kingranch]

Originally Posted by bwmtnbiker

Yeah, according to my edge CTS, I average about 19, 20 on the way to gainesville yesterday. not 100%sure how accurate but we will find out soon lol

I wouldn't trust it. My cs claims Im getting 8-9 on the highway.



Sent from my iPhone using Autoguide

[mclean211]

I don't know if the computer's been flashed or not. I do know that the dealer told me everything is just fine. You'd think they'd check that first but actually, I think they may be a bunch of morons. That was rude but seriously, they're not good.