First off I want to state that I am not complaining about my fuel milage. I bought my truck to pull trailers not for fuel milage.

I just don't get why there is such a big difference between everybody's fuel milage on the forum. In relation to highway MPG, you see guys on here getting in the 20s and guys on here getting around 14-15. I just don't get it. The best I've ever gotten in my stock 05 CC F-250 6.0 Fx4 was 15 on a 55 MPH highway on relatively flat grade in Minnesota on a calm summers day and the MPG was hand calculated. BTW - It was just the truck, myself, my wife, an infant and a little luggage. But I've seen guys on here with the same exact truck and similar loading conditions say they get in the 20s.

FYI - I always use white or gray bottle diesel additive at every tank.

Is there a good reason for this besides the generic answers of (1) everybody has different driving habits, (2) it depends on how you fill the tank up, (3) you might have bad fuel, etc?

(1) I've tried all different kinds of driving styles and the MPG always stays the same.

(2) I always fill the tank the same way. Fill it until the nozzle stops and then add about another gallon.

(3) I've tried multiple different stations and the MPG always stays the same.

I just don't get the massive difference between everybody. My buddies with gas trucks all claim to get about the same. Is it just diesel trucks that are this way?

Or are us guys that only get 15 MPG (highway) have problems with our trucks that need addressing?

FYI - My brakes aren't sticking either, just replaced those (rotors, pads, calipers) and MPG didn't change.

When I hear about stock trucks getting in the 20s, I just start to worry that maybe mine needs some kind of tuneup or something.

Sorry for being long-winded.

Mike

 

I cant speak for others, but I have a 2006 F250 CC short bed, 4wd, only modification is the MBRP 4" turbo back exhaust and I only get 17 on the highway and 13-14 in town. I dont beat on it or cruise above 65-70, but it stays pretty much on those MPG's every tank full, which gets the normal dose of ford cetane booster. I know people claim 20 and that would be great if it would happen, but as you said, these are heavy trucks. I scaled mine the other day with a full tank of fuel and I was 8019# not going to be very fuel efficient at that weight.

 

There are so many variables that come into play with regard to MPG calculation. Not just the environment, how you drive, but the actual build of the truck plays an important part. I wouldn't worry about what other people are getting. If you are consistently getting X and you aren't seeing, hearing, feeling etc any issue(s) then don't worry about it. Now if the MPG goes down from that then I would think that there is something going on.

I have never gotten good mileage compared to damn near anybody else you want to mention(even you get a little better mileage then I do). If everything appears to be kosher as far as how well the truck is handling I wouldn't worry about it.

 

I just wanted to clear this up. That 15 MPG, was a one time thing where I set the cruise right about 55 just to see what I could get. I normally get 11-12 in town and 13.5-14 on the highway.

 

My truck got 16.25 mpgs when I first got it on a 750mile round trip in one day (winter fuel temp hovering around 0 deg F). No stops on the way there and one on the way back. After doing egr delete and 4" straight pipe it bumped the average up to 17-18 ish range this is at speeds of 70-77mph. I get 11-13.5 mpgs in town driving to and from work.

I had some turbo "issues" that I just resolved. So I'm waiting to see how it affects my next road trip coming up.

 

There is one way to fill a diesel tank when calculating mileage. To the very top. That means I have to spend 10 minutes getting the last + - four gallons. Different pumps have different output rates. Diesel fuel foams, so pumps will clkick off at different points.

Don't tell me you've tried different driving styles without affecting mileage. That's absurd. Buy a Scan Gauge II and use it to teach yourself economical driving techniques. You'll only learn when you actually see your right foot sucking fuel out of your tank.

Like Gregory House, M.D., I'm convinced everybody lies about their mileage. Stop reading these threads.

 

That's about what I get, but with it being a DRW with 4.30 gears, I make some allowances.

Be very careful with that. That would include me in that statement as well.

You also have to realize that they may not even know that what they are saying is based off incorrect or bad data. Lying about something implies a conscious effort. I'm not saying that some (or even the majority) don't, but it would be very hard to show that everyone does.

 

In my opinion it's just the variance in the trucks. I don't know what would cause that, but I see no other excuse for the mileage differences. I tend to believe what everyone is saying about their mileage because I religiously get 16.5 mpg, and do a little better when it's strictly highway driving.

Just from reading all the posts here I tend to see more 03 and 04 trucks getting higher mileage. Maybe it's a build difference, maybe it's just the fact that more of the 03 and 04 trucks are more broken in. Idk... I think the answer is there is no real answer.

 

You've got differences between summer and winter fuel. Differences between a hilly and/or mountainous terrain versus on the flat etc. Barometric pressure can even come into play. How cold or hot the ambient temp is. A lot of variables and that just scratches the surface.

 

Man who pi$$ed in your Wheaties this morning.

 

Oh, stop. Like every other mileage thread starter, the OP did not provide complete data (actual weight of truck including load carried, extras like a camper shell - roof height or extended, huge semi style mud flaps - take 1/2 MPG off at 65MPH, the make model size and inflation pressures of tires).

He did, however, provide an inexact method of filling his fuel tank.

Comparing mileage of two or more vehicles that are not EXACTLY the same with EXACTLY the same equipment and EXACTLY the same load driven over EXACTLY the same course at EXACTLY the same time in EXACTLY the same weather with IDENTICAL fuel by the SAME DRIVER is pointless.

**** in my Wheaties doesn't **** me off. Ignorance does.

 

If anybody is being ignorant it is most definitely you and you are feeding way too much into this. The question I was asking did not require the need for minute details such as mud flaps taking 1/2 MPG off.

I was simply asking why there was such a LARGE gap in what people get. I mean when one guy says he gets 22 MPG and the next guy says he gets 13-14, there is something more going on. Either there are MAJOR truck differences or someone is lying.

If you don't like the thread, take you and whatever pole was stuck up your A$$ and read something else.

 

I'm wondering why you are talking to the OP in the 3rd person. Tangent I know.

 

Or there major terrain differences, hauling weight differences, does one have a lift and the other doesn't. Driving styles, winter v. summer fuel, there are a lot more variables then just truck builds or they are just lying.

 

try driving being more mindfull of the boost gauge. keep it under 5 psi and engine rpm around 1800-1900.
that will net me between 20-24mpg going to OKC with no traffic and no wind on summer blend