I'm only getting 15 highway and 8 pulling 8K at 60-65 even with the Edge!![:@]I have 21K on truck.

 

What he said +

Are you reading the mileage using the overhead or hand calculating? Overhead is notoriously inaccurate.

When I started out my mileage was 13's City and 15 highway, now that I've hit 15K miles im getting ~ 15 city and 20 highway if I keep my foot out of it.

 

I have an 07, but virtually the same truck as yours...I only get about 12 in mixed driving...and about 9-10 when pulling a 7500# 5th wheel.

Having owned a Dakota before this truck, I have just succombed to the fact Dodge trucks get ****ty mileage, or at least for me they do. It could be the way I drive, but I have had a Chevy and a Ford now for a work truck (they pay for it, I just drive it!) and their mileage is not that bad and I dont drive it any differently, than I do my own truck.

 

My mileage when I got the truck at 23000 miles might be why it was traded so early, but as soon as I started loading it down and making the engine work the mileage came up, now short trips around town I get 14mpg and I got the same pulling 7000 pounds on longer trips and get 19+on the road at 75.

I got to try Ams Oil in it my 94 Dakota was getting 14mpg after break in and jumped to 16 when I switched it to the 0-40 Ams Oil and 17 when I started using dry-n-wash on the body, it made the truck slick and it slipped through the wind.

I put the dry-n-wash on my cousins drag car and he had to change the his times, as he broke out after using the same numbers for over a year

 

Thanks for all the great information guys, please keep it coming.
Also can anyone tell me exactly what to buy from power service I cant seem to find what I need.
Does anyone think there is something wrong with the truck itself.
I am going to replcae the air filter as suggestged, should I buy a k&n or something like that.

 

If you are going to have it checked out at the dealer, and I think you should,DO NOT modify anything. My truck started out getting 14 and went up as high as 20 (one time) and now is falling back off to around 17 - 18 (empty non towing easy driving numbers). Fuel qualiuty, tire pressure, driving style, conditions, all play major rolls in mileage. My worst towing mileage pulling 8500 lbs at 70+ mph was 9 mpg. Pulling the same camper on the same trip at 65 mph netted 11.2 mpg. I would take it to the dealer and tell them your mileage is in the dumper. I would also have some hand calculated data to backup your claims. After their inspection, and depending on what they come up with, then post what they have to say.

 

10 mpg does seem a little low. Is your rig DRW? 15-17 seems about the norm for new SRW and 13-16 on DRW. People with new trucks claiming 18 mpg are pulling your leg or looking at the overhead which is nototrious for being optimistic. Just try what everybody says about tire pressure, new fuel filter, driving easy etc. Also I thought there was a re-flash the dealer could do on these trucks for poor fuel mileage and excessive smoking on startups you might even check with your dealer about that.

**edited** RE: 2006 2500 diesel getting 10 MPG well obviuosly you have a SRW, doh!!! [&:]

 

DieselJunkey, my numbers are ALWAYS hand calculated, and I keep them in a database. In fact if you do a search you can find my data on this very forum, as I posted a years worth right here.

 

I got 17mpg mix driving off the lot when I bought mine. You may ask the dealer toperform a flash for bad mileage and see what that does. The only bad thing about flashing your ECMis it may fix the mileage, but mess w/ something else.

 

A flash should be yourLAST resort. It is a slippery path in my opinion.