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Fuel mileage Towing & Empty

Old 03-23-2011, 02:54 AM
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Default Fuel mileage Towing & Empty

I'm sure this is a loaded question, Sure to bring on a brands war, But Enquiring minds want to know.

First my F-150 XLT 4.6L V-8 Empty on the Highway gets 21mpg
Trailering on the Highway 8 mpg 10,000 lbs
That's with a 7,700 lb Towing Package.

Second F-250 KR 6.7L V-8 Empty with a 1,150 Miles on her gets 14.5MPG City mixed with a little Highway mileage, and I'm hoping She gets better once broken in. The Dash reads 16.1 but Calculator shows 14.5 Honestly.

Havent hooked up to my boat yet, Obviously, Engine recomendations were wait until at least 500 Miles, and Truck Recomendations Recomended wait until 1,000 Miles I guess to get the Transmission seals seated etc.... And I just haven't had the need to pull my boat yet.

Now I know from other web sites, (Diesel Garage etc...) say they are getting in the Low 20's Empty and swear by 15 or 16 Loaded Trailering, I haven't seen those kinds of numbers yet, Although I will admitt I have a 4 WD.

That said and leave the B.S. and Fish stories Behind, What kind of numbers are you guys seeing with your Tow Vehicles, I definitely have an enquiring mind.

Thanks
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Old 03-23-2011, 04:27 AM
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My duramax w/ the stock tires got 24-25 on the highway @ 75 mph. I went up in size to 265's, dropped to 20-21@ 70. 16-17 around town, that calculator, not DIC. Little harder around town in winter, thinks it's cuz of all the crap they dump in winter fuel and all the idle warm up time. We'll see how she does towing a real load in a couple weeks. If you're towing 10K more than just around town, go with the 3/4 ton.
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Old 03-23-2011, 06:19 AM
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2009 duramax 16-18 daily, Pulling my 3500 lb alumacraft 20ft 14-16
2011-one ton dodge single cab with cake feeder and bale bed 8-10 daily
If you want mileage out of a diesel get an older one, father-in-laws 2002 dodge gets 20-22 daily and 17-18 towing 24ft camper!
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Old 03-23-2011, 06:58 AM
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For you guys who change tire sizes,unless you reprogram the ECU for the larger tires, or compute the real miles vs. odometer miles when determining mileage you are not going to have accurate results.

Here is a tire calc that will show the MPH difference when changing sizes....
http://www.discounttire.com/dtcs/infoTireMath.dos

As for me on a new silverado 1500 for the 6.2 gas motor, and 4 wheel drive, I am averaging 14 in the city with a little highway driving mixed in and 7 towing the boat which is about 9000 lbs. This is with 1500 miles on the truck, so I am hoping it will loosen up and show somewhat better results. Since I live in FL and it is so flat I am interested in doing a comparison between tow / haul on and off when towing. My tranny did not hunt around when I had it off, but being a new truck, I still turned it on.
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Old 03-23-2011, 09:33 AM
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2008 F250 6.4 diesel crew cab 4x4

Unloaded 14-15 mixed city and highway

Loaded (11,000 lbs) 8-10 on some flat and some very mountainous terrain

I think it sucks but theres not much thats a whole lot better out there regarding MPG's for what I need to do
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Old 03-23-2011, 09:56 AM
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2006 Tundra 4.7 L V-8 16 - 18 mixed city/hwy
With boat - 12 - 13

It is cheaper for me to store my boat on teh coast 2 hours away than it is to haul it back and forth. Not to mention I greatly reduce wear and tear on truck and trailer.
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Old 03-23-2011, 10:34 AM
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This is my mileage in the summer. Truck is a 2002 Ford Crew cab long bed, 250 Power stroke, auto, 4wd. Added a 3 inch exhaust to it a couple of years ago. The exhaust removed some of the lag and increased the highway mileage.
Running around town with about 800 pounds in the bed I average 14.5 to 15
If I keep the cruise on 55 on a long trip 20 mpg is easy and have seen up to 24-25.
But if I add anything to tow the mileage falls like a rock. On a drive from WA to Alaska I towed back a boat/trailer combo that didnt weigh more than 2,000 pounds and only averaged 14 over 2,200 miles.

Am guessing our ocean boat and trailer combo weighs in at about 8,000 pounds. When towing it average 11-11.5.

I anticipate every stop and coast as much as I can. Truck has 83K on it and just two weeks ago had my mechanic check out the brakes. Fronts still have 50% left and rears 75%.
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Old 03-23-2011, 10:36 AM
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Dodge 2500 4x4/8l gas V-10
11 empty, 6-7 towing 9000 lb
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Old 03-23-2011, 11:30 AM
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2003 1500 Z71...14/15 unloaded @ 75 on highway.
... 9/10 pulling 23 Maycraft PH @ 55 on highway.
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Old 03-23-2011, 11:36 AM
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03 Expedition 5.4 - 155K miles - stock 2wd. mixed driving - 14.5 mpg. towing big boat - 9 mpg. i never drive over 75 on hwy, last tank was 80/20 city/hwy for 14.5 - generally on a long run at 73 i get 16mpg+ havent seen 17 since 40K on the truck.
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Old 03-23-2011, 11:49 AM
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2007 5.4 F150 on 35's and 4.56 gears, about 13 unloaded all around, about 6-8 towing ~5-10k, about 8-10 towing up to 5k.
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Old 03-23-2011, 12:11 PM
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Should've added, towing my center console, about 3500lbs, I get about 16 highway. As for the tire size, I prob get a little better than what I figure. Reason being the larger tires cover more distance than the comp says, but mine is so slight that's it's not woth forking over the cash for the corrections.
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Old 03-23-2011, 12:17 PM
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2008 Dodge Hemi Megacab

Empty MPG - Bad
Towing MPG - Worse.




15 & 9
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Old 03-23-2011, 12:38 PM
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2005 Chevy 2500hd 6.0l Gas, 15 average driving and 9 pulling my 31 contender. truck has 120,000 miles on it and stock tires. I have no computer so all calculated numbers. Have not towed my flats boat with it yet. Only used it at the ramp at my old house.
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Old 03-23-2011, 04:05 PM
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2008 Tahoe Hybrid tows a Century 2200 CC. I get 23 combined every day driving and 12 towing.
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Old 03-23-2011, 05:49 PM
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2005 Ford Excursion 6.0 4x4 15mpg mixed city/hwy 11 towing 5k on the interstate
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Old 03-24-2011, 09:22 AM
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2010 F-150 XLT SCREW/max tow pkg towing Parker Pilot House @ #6500 gets 19-22 mpg highway without the trailer and 11-14 mpg with the trailer (depends on terrain and wind). I don't drive over 60 mph when towing because I don't like the hassle of passing traffic dragging the trailer, and @ 65+ mileage drops to 9 mpg or less.
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Old 03-24-2011, 12:01 PM
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Originally Posted by Abel View Post
Should've added, towing my center console, about 3500lbs, I get about 16 highway. As for the tire size, I prob get a little better than what I figure. Reason being the larger tires cover more distance than the comp says, but mine is so slight that's it's not woth forking over the cash for the corrections.
My 2005 2500HD registers faster then actual with the stock 245s so your probably right about the 265s being close enough.

I ran 285s for 50K and put the stock tires back on to burn them up. After doing that I couldn't have my speedo off so rather then going back with the stock speedometer settings I used EFILive and a GPS to "fix" my speedo with the stockers, roughly 3-4 mph off at 70. If you actually keep 80lbs in the rear it might not be off as much. I usually keep about 50lbs.

2005 2500HD stock fuel/timing diesel crew 2wd
HW 20mpg
City 17mpg
Towing 15mpg (small boat around 3K)
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Old 03-24-2011, 12:05 PM
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"If you actually keep 80lbs in the rear it might not be off as much. I usually keep about 50lbs"

Jonboater, what does weight in the rear have to do with the speedo and tire size?
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Old 03-24-2011, 12:26 PM
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Originally Posted by demjjm View Post
"If you actually keep 80lbs in the rear it might not be off as much. I usually keep about 50lbs"

Jonboater, what does weight in the rear have to do with the speedo and tire size?
Nothing? lol

Sorry not weight, tire pressure. Going from say 40lbs to 80lbs increases your tire height by straightening your sidewall considerably. Easy 1-2 mph from what I have seen on my truck.
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