Chevy Duramax

[Kasota]

Have any of you guys used a Chevy Duramax diesel as a strictly highway vehicle? I would appreciate any advice you could give me on what to expect for mileage, or unexpected results anyone experienced. Thank you.

 

[Oklahomabassin]

I get 19-20 on the highway doing 80 in a 2007 with a tuned ECM with DPF Delete. I used to get 14.5

 

[advmotoxc]

I had a 2006 LBZ, stock got around 18mpg. Then tuned, intake, and exhaust got 19-21 at about 70 mph. Put a 6" lift and kiss the mileage goodbye again.

 

[BikerHT]

I drove an 03 1-ton, dually for about 9 years. Had 260k miles, 3 sets of injectors and a Hypertech programmer.
Averaged 19-21mpg solo and 10-12 pulling a 42', 18k lb 5th wheel camper.

Traded it last October for an 09 F-450. Getting 10mpg solo and 6mpg pulling my RV!

 

[Drgnracin72]

i have an 07 classic, tuner and exhaust, and it gets 21 mpg if im careful. in town driving will yeild around 14-15mpg. love the truck.

 

[Glock]

I've got a 2012 2500hd Sierra, gets roughly 600-640 miles per tank in hot weather. 550-600 in winter and when pulling a 21ft nitro. Of course, it costs about $120 to fill it up again.

 

[Wild Weasel]

2003 quad cab with 6" lift with 35" tires quadzilla programmer 5" exhaust 19.4 ton driving daily as my work truck.

 

[SgtMojo67]

2003 quad cab with 6" lift with 35" tires quadzilla programmer 5" exhaust 19.4 ton driving daily as my work truck.

Hanging out at the gun shops hardly counts as work!

 

[davek]

My 2006 3/4 ton crew cab is unmodified, I get a little over 16 MPG overall.

 

[Wild Weasel]

Hanging out at the gun shops hardly counts as work!

I have to work getting there!