I AM A NEW MEMBER OF THE CUMMINS FAMILY (24 VALVE 2500 QC 8' BED 20,000 MILES AND GETTING 11.7 MPG HALLING A 16' BOX TRAILER WITH LITTLE WEIGHT. MY 1500 GAS GOT 9.2 WITH THE SAME LOAD. THIS IS A INPROVEMENT BUT I EXPECTED MORE
IS THERE A PROBLEM OR IS THIS NORMAL

 

SEE OTHER (FUEL MILAGE???????????)

 

but did it pull the load at teh same speed? im sure the wear and work load on teh gas was much greater!

bomb it up!

 

THE GAS WAS A 5.9 6' BED AND HAD SOME ***** AND SEEM AD TO ACCELORATE UP HILL BETTER. ????

 

DO YOU KNOW IF THE BOOST CAN BE RAISED OR LOWERED ON A BONE STOCK TRUCK

 

WELL

 

I'd check into it a little more. I just pulled a car trailer with a 6000 lb john deere skid steer on it for about 50 miles and got around 13-14 mpg. Mostly flat, but a few hills.

 

Have paitence young grasshopper.

 

You waited less than an hour before you made your second post because no one had replied yet.. Post it up, then wait a day or so, my bet is you'd have replies that you wanted. most of us are in bed by now, which is where Im headed.
Scott

 

I get around 14-15 MPG towing my Jeep on a trailer (~6000 lbs combined). My truck is a 2WD, so 13-14 MPG is probably about right for your 4X4.

 

The Cummins get into its "Happy Spot" & will get its best milage at approx 2,000 rpm.
Faster than that, and milage will drop off.

 

Welcom aboard and condgradulations on the new to you truck. Do not know where you are from, but it might help to understand the time difference from where you are at and the time this site runs on, as I am writing this response my time is 9:40 am and the boards time is 9:40 pm, there is a lot of great help here so like Bigblue said be patient. Goodluck,,,,,,Rick

 

10 mpg on interstate towing 9,000lb 5th wheel at 70-75mph. My biggest problem is wind resistance. For me, slower = better fuel mileage but then I am at less than 1800 RPM (in OD) which I have always heard is hard on the automatic transmission. Put a fueling box on that truck and it will eat your old 360 for lunch.

 

i get 15-17 running around empty.

I usually get 11 flat pulling any load. But i usually run hard on the interstates. 70-75 pulling my 2 horse (xtra tall/xtra wide) trailer to ropins.

what tranny you got?

 

If your 360 pulled better than your cummins you either had a great 360, or this CTD is broken in some way.

Checked the basics? Air filter clean? Fuel filter clean?