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I used figure fuel mileage with every tank when I ran the F350.  It got 8mpg loaded w/ 15,000 to 18,000lb trailer @70mph.  I also have a F250 w/ 7.3L That gets 16/17mpg around town, empty and 19mpg out on hwy, empty.  The last load I pulled with it was an enclosed car trailer that weighed about 15,000. At 70mph it got 13mpg.

I believe your Dodge w/ Cummins should/could do better than that. A loss of boost due to a leak will cause mileage to suffer.  Fuel filter/air filter clean?  Tire pressure good?  How many miles on truck?  Injectors all good?  Wind drag on your load?   There are so many factors that could cause a decrease but 5-6mpg leads me to believe that something is wrong.  You may want a mechanic to hook up the diagnostic computer to it.

~ Hotshot Transportation Co. ~

...and I see a truck stop sign ahead, so I change lanes...  I need a cup of coffe and a couple dollars change...

USDOT 1553028   MC 576750

Also, its the quietest truck Ive ever had, no problems yet but only have 3k miles on it.

Don

With a combined load of 23K lbs i get 6.5 miles / gal to 9.5 miles / gal. Usually the lowe m/g is on steep upward terrain and wind factor.

This is my 1st truck and i have a manual trans, and I believe I got me a good deal.

I use it to haul cars on a 50 feet wedge trailer.

Hope this will work. see my pictures too on my profile here.

eye'd cell dat twuk!

AAMS Transport

usdot#1570547 mc#580659

u suggested i cell the truck becoz of the mpg i assume.wat will be the around near good figure for mpg. it hasnt been twicked with all factory settings, i assume.

on another note wy i might now considering selling the truck.i have been pumping money to run this venture. i bet i got into it a the wrong time, ...fuel costs.

however on an unrelated note, this is the 2nd time it has done this, i have had uncontrollable vibrations from the front axle. they are hard to control that i have to force break it and then everything normalises. i am not sure if u can help pliz anyone i would appreciate the trouble shooting. the steering wheel will harder to cotnrol cozed by this sudden vibrations coming from the front axle.

last time my drivetrain rear axle broke after such vibrations and i am afraid it culd be the front axle now.

Any help pliz.

Alphastock 

You can still make money, even with the high cost of fuel.  Take a look at how you are doing business.  You can only try to crack open a nut the same way so many times without sucess, before you need to find a different way to do it.  In my opinion, the best way to make money with your set up, is working within 300 miles of your home area.  Anyway, good luck, hopefully nothing major is wrong with your truck.

I don't know what a good MPG is (or should be) for the Cummins in the 3500s..... I've always run Duramax in the 1 tons.  My normal mpg loaded, east of the Mississippi is around 11.5 mpg and out west it would still be above 10 mpg.  Around home I get as high as 19.5 mpg with nothing behind me, but that's at around 50-55 here on the local highways.  I try to run the posted speed limit so in the western states my fuel mileage dimishes accordingly with the higher speed limits and bigger hills....especially in Colorado, Montana and Wyoming areas.......and I cheat a little more out there where I'll usually run about 5-9 mph over the posted limits.  I always thought the Cummins was more fuel efficient, but from what you guys are posting recently, that may not be the case.  When you're getting down in the 6-7 mpg range on these little diesels, you're down there with the big guys running Class 8s.  And that ain't good!

.....Don