Towing a boat about 3500lbs or my trailer 4500lbs I get 11.8.
it seems if you put anything on it I get 11-12 MPG is this normal?

 

That seems low to me. I've got a 6 speed and get a little better than that pulling about 9k. Pulling the boat, the overhead readout typically reads between 12-13. Hand calculations for fuel mileage always figured to be about 1.5 mpg better than the overhead readout.

How many miles on the truck? Maybe just give her some time to break-in some more.

 

About right. I get 11.8 with a 6000# TT. Mine is about the same as your.

 

I don't know, I get 12.6 ;D with 10K behind the truck. But then again, I'm 2WD.

 

How fast do you drive? Speed is probably the biggest variable in towing mileage.

I get 12 dragging a 7K TT, but I'd do better if I slowed down a little.

Also, how many miles do you have? CTDs frequently do better after they get a few miles under their serpentine belt. ;D

 

I just got back from a trip from southern Oklahoma to Colorado and back towing my 22' Hi-Lo ( about 4500 lbs.).

Drove 2773 miles and used 192.3 gallons of gas for a total of 14.4 MPG. I usually drove the speed limit - normally 65 to 70 MPH ( speed limit over Wolf Creek Pass was 45). I crossed Wolf Creek Pass, La Veta Pass, Raton Pass and Cumbres pass.

The truck had 2805 miles on the odometer at the start and 5578 at the end. There was a dramatic increase in gas mileage about half way through the trip. The first two fill ups I averaged 13.3 MPG each and the last 2 were 15.3 and 14.7. Of course the low profile of the Hi-Lo trailer helped get better mileage than you would get with a high profile trailer of the same weight.

The truck pulled great and the 48re worked good. It started easily one morning when the temp was 21 degrees. Of course this light load was no match for the big Cummins. Guess I will have to get a bigger trailer to really test it!

 

14-15 at 70-75 pulling #6000 Artic Fox trailer. Should have more wind resistance that boat so I think you are low unless you are going 80

I have a 48RE

 

I'd say you are about normal. I get 13-15 empty and 9-12 loaded.

 

I have about 5500 miles on my truck.
I drive about 55 60 mph.
sometimes in od and out of od
The boat has a big flat windsheild on it
I get 19 mpg not towing freeway about 60-70 mph
Thanks for the help
Cliffford

 

We are towing around 18,K aand have seen anywhere's from 11 mpg to 9 mpg. We drive conseratively most of the time...about 65 mph on cruise and in overdrive with the air on. When we're not hooked up we get about 18 mpg w/air and as much as 21 mpg wo/air, according to the on-board computer that is.

 

On my firtst trip ( 1,900 miles ) with 8,000 miles on the truck pulling a 12,000lb. 5er. I got 11.1 MPG. The trip was thru the SMOKIE MOUNTAINS AND REG. flat driving. Daily driving we get 18 MPG, I'M HAPPY!!!!!

 

I pull a 30' party barge, has a full cabin on the stern. Get about 9 -10 mpg.. @55mph. Pulls like a drag chute. Get 20
plus running light at 65mph
Gene007
WarWagon

 

This weekend 6K TT at 68-70 on I75 and 35-60 on 301 through Stark, waldo and Ocala. Avg 11.2 mpg. Still better than I got on the 99 F150 unloaded in local traffic.

 

120 mile round trip towing a 2 horse trailer (lots of wind resistance), weight approximately 6,500 lbs, speed about 110km/h (65 - 70 mp/h), overhead computer indicated 12.5 mpg. Truck only has 1,800 km (1,100 miles) on it.