6.0 Fuel mileage - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 08-16-2009, 08:54 AM Thread Starter
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6.0 Fuel mileage

I have complained about the mileage of my truck before on this forum and also read where some guys are getting 14-18 MPG towing outrageous weights (18-20K). I tend to dis-believe anyone who says they can get these MPGs out of a stock (no mods whatsoever) truck! Here is what I have experienced: I have a 14,450 GVWR fifth wheel toy hauler and pull it with my F-250 FX4 CC SB truck. It has absolutely no mods. I get anywhere from 9-11 MPG on a good day - if I am running into a headwind, forget it; I get 5 if I'm lucky. (I'm glad it's not a gasser - the mileage would be worse than that!) I am willing to take the concensus' advice and mod this truck (4" turbo back w/no cat, low restriction muffler, gauges, and an SCT tuner). My question is this: Do you REALLY get better mileages with mods like this? I'm not talking around town; I'm talking about going 1600 miles (one-way) through all kinds of terrain - like the mountains of Colorado and New Mexico to the flatlands of Indiana and Illinois. If you can get these gains by going the mod route, why do the manufacturers make the mileage on these trucks so bad?

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2011 F250 KR FX4 4x4 CC SB
2006 F250 XLT FX4 4x4 CC SB, EGR Cooler Delete, AutoMeter Gauges, Scangauge II, SCT x3 Custom Tunes - SOLD!
2009 Keystone Raptor 33' Toy Hauler Fifth Wheel
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post #2 of 11 Old 08-16-2009, 09:20 AM
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I have an 07 F350 Crew Cab with no mods. I am getting about the same mileage as you, pulling an 8X16 enclosed trailer 80 mph. I would love to get the mileage everyone "claims" they are getting. The main reason i bought a diesel was to pull a trailer at interstate speeds. Coming from an old wore out 351W i am more than happy with the power and mileage so far.
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post #3 of 11 Old 08-16-2009, 09:24 AM
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Pulling a 16' enclosed trailer I get about 13 on the highway running 75mph. I tend to disbelieve anyone that says they get mid to upper teens while towing too. That's with a tow file.

That being said when I'm unloaded and running a race tune I see 20mpg at the same highway speeds.



'06 True Blue/Silver 250 crew cab
ARP's, EGR blocked
AFE stg.2, MBRP 4" pipe
Air Dog 150, ITP reg. return
Bulletproof oil bypass system
Banks technicooler
Ride rite air springs in the rear
EGT, boost, and fuel pressure gauges by DiProcol on the pillar

Plus a few other odds and ends...
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post #4 of 11 Old 08-16-2009, 11:47 AM
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I think I can safely say yes, you will absolutely get better mpg with mods, if you drive nicely. However it might only be a 2-4mpg improvment hauling a brick like that. Even if you dont want to tune it, a free flowing exhaust and egr delete will help alot.

2008 F250 4x4 6.4PSD Auto
Tuned, deleted, studded, piped, bts'd...
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post #5 of 11 Old 08-16-2009, 11:53 AM
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Diesel MPG discussions have more exaggerations than a bunch of guys talking about their johnsons

My truck pulls great and it has tons of power compared to the old gassers I used to have. The mileage is nothing spectacular. I have NEVER gotten above 11 mpg towing my 7500 pound travel trailer.

So, the same guy that tows 15k getting 18 mpg also has a 12-inch John Henry Doubtful on both counts.

The Manatee

15 F350 Long Bed, Crew Cab, Lariat 4x4, 6.7 PSD

Last edited by Manatee; 08-17-2009 at 09:34 AM. Reason: correction
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post #6 of 11 Old 08-16-2009, 04:05 PM
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I just hauled my 10,000# toy hauler 160 miles today, also had a two up four wheeler in back of truck, got 12.9 mpg. I only get in the 14s empty, never seen the high teens that some say they get. this was using spartans tow tune w/brake. Truck pulls awsome, blows my old 5.4 gasser away

06 F350 lariat crewcab srw
2.5" leveling kit, spartan phalanx,egr cooler blocked
Fumoto, upfitter sw
HighIdle mod.
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post #7 of 11 Old 08-16-2009, 04:13 PM
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My '06 250 CC LB is set up with an aluminum contractors cap and a steel gang box and diamond plate drawer pack bolted to the bed. Normally sits about 9100 lbs. loaded up with tools and material. Highway runs about 16-16.6 mpg, alot of city puts me at 12-13. If I pull my 29' travel trailer (7800 lbs.), mostly highway usually, I'm looking at 12-14. That's with intake and SCT X3 tuner.

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post #8 of 11 Old 08-16-2009, 04:51 PM
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i haven't hand calculated mine but just going off the overhead gauge i show 17-18mpg everyday in my excursion but when i hook my car hauler up and put a v8 ranger that weighs 3400lbs plus trailer. i get about 11-12 on the same gauge. the X has higher gears than most of the trucks out there tho. does this sound about right?

2003 excursion

6.0 psd baby!!

100% stock for now.

clean oasis report. not a single item till now.

76,000 miles when i bought it.

needed 2 injectors, y pipe, lower rad hose, egr valve.

now has 82,000 miles.

lovin every min of it
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post #9 of 11 Old 08-16-2009, 05:09 PM
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pulling 8-10k i was getting 11 ish stock. i did have power and my egts would get close to 1000 on small hills and would spike above 1300 on a long hill. with the spartan heavy tow with turbo braking i got 1-2mpg increase but the power was what made the difference. i found alot better milage by driving the turbo thru the hills. i have seen 18+ but nothing over 20 hand calculated. i am tuned but i have stock tires and a stock exaust. the price for the tuner is worth the power to me.

2006 f250 4x4
crewcab shortbed
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Some tuning, gauges and other assorted non factory dodads
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post #10 of 11 Old 08-17-2009, 05:54 AM
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I have am on a road trip now and have put on just over 6000 kms towing a 9500lb travel trailer from BC to southern Ontario over a variety of terrian. The best I have got for mileage is just over 14 and the worst is 12 imperial mpg. I started the trip on Innovative's tow tune and got between 12 and 13 mpg. After a couple tanks switched to Street and got between 13 and 14.

Overall I am satisified with that... I had an 05' F150 and towed a 8000 lb travel trailer and got between 10 and 12 mpg and didn't do near as well towing.

Interesting though, was travelling with my Dad who has a 02 7.3L and is towing and 14k fifth wheel and he got pretty much the same mileage as I did.

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