DMAX MPG?

04Chevy2500HD · April 18, 2004

What kind of MPG is everyone getting on there DMAX? I drove mine to Southern California back the first part of March from Portland and got about 17MPG. I have heard of people getting 21 MPG+ on the highway. Is there something I should be concerned about with mine or what.

I am getting about 15 in the city right now and 17 on the highway. With the cost of diesel now up and over 2.00 bucks a gallon I am starting to pay close attention to this stuff.

-David

MCourson · April 18, 2004

How many miles on it? Being a 2004 I doubt it has very many so I doubt it is broken in yet. 20+ MPG didnt come here until about 30k miles. It has 35k on it now and it is still getting better.

04Chevy2500HD · April 19, 2004

Well that may explain something... I am at 13500 right now. Guess I just need to spend more to get more.

Buddaorf · April 19, 2004

Hmmm Got a 2002 GMC 2500HD with the DMAX. Its got 64000 and get 12 to 13 city and Hwy 18 to 19 mpg

KyleBst264 · April 19, 2004

I am getting about 15 in the city right now and 17 on the highway. With the cost of diesel now up and over 2.00 bucks a gallon I am starting to pay close attention to this stuff.

-David

Put the Instant Fuel economy up on your DIC and leave it on under all of your driving. This will help you adjust your driving habits. I.E. Use the Allison to help you slow down for stop signs and stuff. By theory, the less brakes you use, the less fuel you'll use. Also on the highway, fuel mileage with the duramax goes downhill very quick after 70 MPH.

422 SS · April 19, 2004

Also on the highway, fuel mileage with the duramax goes downhill very quick after 70 MPH.

It does for any diesel that I've ever owned really.I get 18.5-19 on the freeway at 80 mph.If I slowed to 65 mph it would probably get 20+.I have 33's and a plow attachment up front with a CCLB so my mpg is is a little off some of the guys with smaller trucks.

I wonder what a 6-speed regular cab 2 wheel drive would get at 60 mph.

Raven · April 20, 2004

I just turned over 2250 miles and got 17.9 (actual) on the last tank with a mix of highway and city driving (~ 50/50).

Very happy so far!

LARSONEM · April 21, 2004

Oh how I love fuel mileage stories. The bigger the better. Truthfully I get 14-16 in a combination of driving city/highway (I never drive all highway or all city) and 10-11 while towing the camper. Saw a little over 17 once that was about 250 miles of almost all highway driving. I know I'm on the low side compared to what people report, by mine is honest and accurate - NO BS. And when I look at a truck that is loaded with power and tips the scales at 6500+ lbs, I don't feel really bad about what it gets. I've got about 12K miles on it now.

bigdogs · April 21, 2004

My average with probably a little more city driving than highway is 17.9MPG on my 03 Dmax/Allison ext cab short bed.

linda · April 21, 2004

i have two buddies with the DMAX...one is a 2004 and one is a 2002. The 2004 gets 17 hwy and the 2002 gets 19 hwy. I drive a 99 7.3L ford at work and its lucky to be getting 11mpg on a good day!

Butch 02 Denali · April 21, 2004

The custom tuners like Wester's are getting 4-8 MORE MPG in the DMaxes, along with huge increases in torque and HP! Might be worth checking into!

Butch 02 Sierra Denali

Chevyfreek · April 21, 2004

I agree with that 100%....

Machine · April 21, 2004

The custom tuners like Wester's are getting 4-8 MORE MPG in the DMaxes, along with huge increases in torque and HP! Might be worth checking into!

Butch 02 Sierra Denali

You guys are drinking the Westers kool-aid way too much

You just posted a claim of a 20-40% increase in mpg's from an engine that usually delivers 18-20mpg's, highway. It’s just not realistic for any HiPo tuner or tune.

I would like to address Westers when talking diesel - Please correct me if I'm wrong but Westers has just started to sell HiPo programs for diesels and offers a 50HP power setting for around $500, a 90HP setting for $800, or a combo of two settings for $1200. Is that such a great choice to go with when a product like Juice offers 4 power settings (40, 65, 90,125 HP plus attitude monitor) in one unit for $900? Juice is the gold standard in the area of medium performance tunes for the Dmax (medium ='s 0-135HP)

I know you guys love Westers; and for a gas engine he's one of the best, but for diesel applications he's going to have really perform the 4-8 mpg miracle to outperform Edge, Quad, Diablow, VA, etc. in power options, overall options, mpg's, and cost. Until then, Lyndon is not a serious player in diesel. Please don’t think that I’m trying to be aggressive with this post – that’s not the intention, but Lyndon has a lot of work to do to be a leader in an already established market - and erroneous claims of such a drastic increase in mpg’s does not establish credibility. It’s misleading. Thanks for reading.

Nitro · April 21, 2004

Seems everybody leaves out the gear ratio of the truck. 3.72 compared to 4.10 would make a pretty large difference in fuel economy. Also, some taller tires would help out.