Fuel Mileage..

[LT67]

..... or lack of

Just curious what some of y'all are getting for fuel mileage from your CUCV. My M1008 with 35's gets 17-18mpg on the highway running 55-57mph. Stop n go driving while running errands it just drinks fuel... 10-11mpg. That sound normal?

 

[nyoffroad]

Sounds about right, I get a bit better but I'm pretty light on the pedal.

 

[Iceman3005]

Mine seems to get around 17-18 driving back and forth to work. If I do a lot of stop and go, it gets around 15. It's never dropped below 15 mpg.

 

[Barrman]

Diesel engines are great constant speed motors. Make them pull a 7,000 pound square barn door up to speed, sit at a light and repeat is not showing their good side. Especially if you are trying to keep up with traffic when pulling away from a light.

Your numbers sound pretty right on.

 

[blueblaze]

18mpg? Wow. I've only gotten that with a Blazer. I get 15mpg regardless if I have a load or not, with slight variations. Even with the nv4500 swap. I do have my pump turned up though and heavy 33s, but its an entirely new injection and fuel system. Even before with the 400 I only got about 15mpg. The overdrive just increased drive ability and top end. With the 700r4 installed prior to the Nv4500, it was such a dog. The OD in the 700r4 was too low for anything bigger then an ant hill and the constant downshifts didn't make it worthwhile. Sometimes I wish I lived in the prairies. Meanwhile my 85 half ton C10 with a cummins and a 5 speed does 32mpg easily, more if you drive like a senior. And can still do a 2nd gear burnout. The turbo is definitely the key to using all the fuel the engine can deliver.

 

[nyoffroad]

As a truck driver I've learned a few things about fuel economy.
Tires with tall side walls are NOT your friend, the flex more and cost you money.
The more aggressive the tread = lower MPG , not what you want to hear!
Synthetic oils and greases are your friend, use them and you'll love em.
Your pump is turned up lets say 10% well that equates to a 105 LOSS in MPG
The rest is how you drive.

 

[ken]

With a 6.5 turned up 1/4 turn, and a ram air snorkel tube on a otherwise bone stock M1028A1. I get 19-21. Towing my tractor I get 17. I mostly only run 50MPH.

 

[LT67]

Cool.... thx for the responses.

I figgered my mileage was about as good as it's going to get considering the gearing, tires and minor lift. It's still much better fuel mileage than the 406sbc in my 79K20... lol