2500HD Diesel Mileage

Johnnyee · November 2, 2015

Thanks for your reply. Anyone else?

After 22,300 miles, my overall average is 15.95 mpg. Of those 22,000 miles, approx 7,000 miles were pulling a trailer, where I'm getting approx 12.5 mpg. My highway mileage runs between 19 mpg and 22 mpg. (I just returned from a 2,300 mile trip (no trailer) where my trip average was 20.45 mpg.) The remaining 13,000 miles includes local driving, as well as some 200 mile trips around Texas. My in-town/local mileage runs between 15.5 and 17.5 mpg, All of my numbers are hand calculated because the DIC is showing to be off by 4.01%. I hope my experience helps. Good luck.

avalonandl · November 3, 2015

After 22,300 miles, my overall average is 15.95 mpg. Of those 22,000 miles, approx 7,000 miles were pulling a trailer, where I'm getting approx 12.5 mpg. My highway mileage runs between 19 mpg and 22 mpg. (I just returned from a 2,300 mile trip (no trailer) where my trip average was 20.45 mpg.) The remaining 13,000 miles includes local driving, as well as some 200 mile trips around Texas. My in-town/local mileage runs between 15.5 and 17.5 mpg, All of my numbers are hand calculated because the DIC is showing to be off by 4.01%. I hope my experience helps. Good luck.

consistent with me, the DIC is about 5 % optimistic

calgator73 · December 16, 2015

Old thread... Thought I would update. I drive 130 miles/day on the interstate last 5 miles bumper to bumper doing 2-3 over posted limit. My best 25 is 24, 50 is 21.5 and 400 is 18.5.

Sent from my LGLS990 using Tapatalk

JRKRACE · December 16, 2015

I have yet to break into the 12's no matter what I do...10 mile commute with some highway here and there....

aminga · December 17, 2015

I have yet to break into the 12's no matter what I do...10 mile commute with some highway here and there....

It's not getting warm/hot. Their kind of a pig with the engine cold.

KMGZ400 · December 17, 2015

It's not getting warm/hot. Their kind of a pig with the engine cold.

Id have to agree... When I DD'd my LML for 2 months I was short tripping it, I had maybe a 6 mile ride to work.. MPGs were around 12. Now I only use for longer trips or I use it to the point where it's 100 percent warm and I get about 16 city

aminga · December 18, 2015

The instantenous mileage on mine never gets above 12-13 if the engine is below 200 degrees.

Now in October I did manage Above 30 MPG on a 25 mile average. The fact that i was coming back from Clingman's Dome probably matters a little.

Cowpie · December 19, 2015

yeah, kinda like a trip from the Eisenhower tunnel on I-70 in Colorado back to Denver. Easy to pull off some pretty good mpg when most of the trip is downhill. I love those short mile mpg's in those situations. At least if feels good at the time!

calgator73 · December 20, 2015

Just completed a 19hr round trip from Hampton Roads to just east of Nashville. Each tank was 19.5mpg. Really curious though about oil life...going to search the forum.

shedkept · December 24, 2015

Our '14 did better.

This '15 hasn't come close to the 21-22 mpg I could get out of that truck (it averaged 17-17.5). I'm averaging 16-16.5 mpg. Have seen 19mpg on the road. Truck has 9,000 miles on it.

I'm going with the "it ain't broke in yet" theory.