My 2005 F350 Diesel on the best day got 14.7MPG per tank. I kept the rpm under 2000 when I started out. Kept my speed at 55MPH max. This is the best I can get? I read people getting 20 MPG @ 75 MPH what is up with this? I keep all filters and oil clean. Tires at there recomended tire pressure. Still I can't get anywhere near 18 MPG. What am I doing wrong?
I don't know either! My mileage is all over the place, if I drive all city with limited hwy I usually get 10-12mpg (10.9) today if I have it on the hwy I average 16-18 if I keep it below 70mph anything over 70mph seems to just waste diesel, I took a trip to San Antonio and I'll say averaged 85mph I had a couple 100mph stretches and got 14mpg! All highway too.
If anyone has any tips let me know, I tried to do the best I could this last tank I never let the turbo psi over 15psi and I rarely got past 2500rpm, and (granted it was in town) I still got 10.9. Very disappointing!
Current - '99 F350, 7.3L, ZF6, 4wd, 250k miles and cracked a ring! D'oh! Rebuilding in progress!
The old- Ford F250|6.0L Diesel|5 Inch Flo-Pro System|ARP Studs|EGR delete|Harpoon mod|High idle mod|DS Tuner|AVIC Z2
Mileage is affected by rear end gear ratio, tire size, cab size, vehicle payload weight, hrs on engine, fuel quality, wind speed, etc, etc. Also, you can't always trust the overhead "lie-o-meter," use actual fuel consumption and miles to get real-world mileage. Also, some engines just get better mileage than others.
I found that using the cruise control on a flat highway seems to have a positive affect on the mileage....
I get around 18 MPG if I press on the pedal and around 21 MPG if I am using the cruise.. You can hear the difference in the engine with the cruise on. Seems to be working less
I have found the mpg plunges during cold weather especially with frequent short trips... Under 10 miles or so. Although I usually don't drive short distances, therefore my average mpg is fairly respectable for DRW at 15-16 mpg. I'd highly recommend a quality fuel additive, 5W40 synthetic oil, fully inflated tires and a light right foot
__________________ 06Tow Boss F350 DRW/4.30 CC Lariat LB FX4 TS 4X4 6.0PSD
Truth is confrontational: Very few can legally tow what I pull 6.0 Grin 2/26/03- 07/12/12
I've kept track since I got mine Sept '06. Over the last 6304 miles(lost earlier data) I've used 396.120 gallons of fuel. 15.9...mpg average. This is probably 95% city type driving, 5% freeway. Stock except for the muffler delete and Zoodad, but I doubt they make a huge difference. My worst tank was 14.9, best 16.6 mpg.
2005 F-350 Lariat CC LWB 4WD, 6.0 PSD, 3.73 LS -LineX'd, Husky flaps(fr), DuraFlaps(rr), Muffler delete, WeatherTech Liners, Zoodad Mod, 295/70R18 Nitto Terra Grapplers, Fumoto, Garmin Nuvi350, other stuff
What kind of fuel additive would yall reccomend for better mileage?
Anything that raises cetane number will help the fuel combust more efficiently, which generally translates into better mileage. Some of the more popular cetane boosters are Stanadyne Performance Formula, PowerService Diesel Kleen (grey bottle), Opti-Lube XPD, SoyUltra, Motorcraft Cetane Booster...numerous others. The cetane number of biodiesel is naturally higher than conventional petroleum diesel. Very little smoke from it, although it has less btu/gallon than petroleum diesel, so it's a trade off.
Don't expect any additive to dramatically increase mpg, though. One or two percent would probably be typical.
I recently discovered that I get better mileage when towing my 21 ft bass boat in tow/haul than I do in town (via lie-o-meter) 17.9mpg vs 15.9. I can average about 18-19 mpg on the highway. f-250 crew SRW
2006 SD King Ranch 6.0 PSD
MKM EGR delete, ARP studs, Blue springs, 4" turbo back, Sinister coolant filter, Livewire TS w/Innovative tunes. Driver wears a "Power Grin"
Sure, I'll race your Corvette! You pick the distance
(I'll pick the terrain)
I use Diesel Kleen and try to keep my foot out of it and my best MPG empty was 14.7 I must be doing something wrong! Will a programmer or module help me get more MPG? I read that they do but what has people with them increased there MPG or any at all. Is what they tell me the truth? Or do they just deprogram HP to obtain the results? I just need the truth from owners!!!!
LOL, the truth is these are big honkin trucks. Even if a tuner could improve on the programming that hundreds of professional engineers developed while trying to balance power, economy, and reliability on these trucks, I doubt it would be worth what the tuner would cost you. Sure, I wish mine could get 20 mpg at 75 mph too, but I'm not going to spend money trying to reach that because I don't think it's possible. My 2 cents.
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