[Camstyn]

What is everyone getting for fuel mileage? What truck configuration, what type of driving, and how many miles are on the truck?


I'm averaging about 21.5mpg so far, mix of around town and highway. My best so far was 24.2mpg on a 300 mile highway trip, with the cruise on 55 - 60mph. Driving style is somewhat heavy footed around town (I love hearing that turbo and the straight piped exhaust) )but I set cruise at ~65 on the highway and forget it. I just turned 3000 miles the other day.


Truck is a '03 regular cab longbox 4x4 with the ZF 6speed. Since going to the bigger tires (315/70R17), it threw my odometer off 12%, but doing the proper math my MPG dropped about 1.5MPG from before with the stock wheels and tires.


I'm in Canada but I'm using US gallons as I'm sure most of the others here are from the USA.

 

[Mr X]

I recently did a 420 mile trip with the cruise control set at 75 and avg. 19.8 mpg. The first half hour of the trip I was stuck in stop/go traffic, so I figure about 20 mpg at 75 mph. I get 11.5 -to- 12 mpg towing.

 

[Diesel Power]

Good mileage numbers camstyn! I wish i could get there. I've got an 02 CC/SB 4x4 D/A with 285's. Most of my driving is in town (Sacramento, CA with a decent amount of traffic) and I get about 16 MPG. I run a predator to calibrate my tire sizes + power enhancement. i run with a HEAVY right foot, just like mackin'

so the MPG could be better. the best i've got on the highway is 18. speed makes a huge difference in my truck. i usually run 75-85MPH on the freeway. if I run 55-60 my MPG goes way up......

 

[Wiley]

Just back from Burningman for a round trip of 573 miles pulling a 13K 5'er averaged 13.5. I think that's great for the elevation change to high desert.


Don't have a benchmark on my towing mileage before adding the Nicktane filter, but gained aobut 1/2 mile per gallon when not towing.





I'm a happy camper.

 

[CS-Dmax]

Towing a 5.5K trailer, at 65-70, from Colorado to Illinois I averaged about 14 mpg. New truck, with less than 2000 miles on it before leaving.

 

[k1xv]

I got my all time best on Sunday. On a 250 mile ride (empty CC D/A with an ARE Z cap, no mods) from Vermont to NJ, the DIC showed 24.3 mpg. I am at 16K miles on the odometer. Average speed on this trip was around 55 mph, very little traffic or unnecessary stop and go.

 

[4x4man]

Best mileage so far is 19.5mpg from Vegas to Colorado. This was with a bit o' juice as well..


Towing, my mileage seems to be around 10-14mpg depending on terrain and what I am towing. I double trailered to Pueblo a couple of weeks ago, toting my buddies 4k boat behind our 10k 5er. I estimate I was around 21,000lbs total and got 10.5 doing 65-70mph. Not to shabby at all. Working on 11,000 miles on my 03 DMAX.


Bob

 

[Tsckey]

I've gotten very good fuel mileage since my truck was new. But a couple of months ago, just after installing my Amsoil air filter, it dropped about an mpg in general driving. I still don't know why, but this past weekend we towed our Coleman to Santa Rosa and back, averaging 17.5 mpg. That's not bad. The Coleman, of course, doesn't weigh squat, but towing anything drains off a bit of mileage, so I figure I'm back up where I should be. I usually get 15 around town and 18-20 on the road.

TC

 

[kbstinky]

Had my dmax for about 18 months (22K miles) and am very happy with mileage:


Towing 13K 5th wheel, 10-11.3


Highway, 19


Commute/town, 14.5


Totally stock, but has more power than I can use.

 

[gwmayes]

Wow, those are some pretty good numbers there Camstyn. Run that thing over a certified scale sometime with a full tank. I'd be curious what a regular cab weighs compared to the Ext/CC.


Ok, how 'bout some numbers from the log book of an anal engineer?


My "tow" is a Fifth Wheel that puts the Gross Combined Weight right at 15,800#


----------------------------------------------------------


Actuals from a log book. ... I find the trip computer to be a bit (10-12%) optimistic.

New, 10 Miles on Odometer.
283 Miles Mostly city driving 13.59 mpg
276.8 Miles City, plus a trip to Santa Fe 15.07 mpg
174.9 Miles All city driving 12.31 mpg

1st tow to Ft. Collins and Back Cruise Control on 70 mph, my apologies to you if you think that's too fast. I-25 is solid tractor trailer rigs doing 75-90 and you are a hinderance to traffic running along at 55-65. Also, I ignored the 500 mile towing/60 mph recommendation in the owners manual since I stopped frequently and shined the IR temp reader on the pumpkin. Never saw over 250 degrees F. On the trip home, never saw over 200 degrees on the differential. Think I got a good one!

190.6 Miles Towing 9.37 mpg
172 Miles Towing 9.21 mpg
227.7 Miles Towing plus local driving 12.95 mpg
245.1 Miles Mostly towing 11.69 mpg
138.2 Miles Towing 10.18 mpg
224.6 Miles towing 9.62 mpg strong, 30 MPH headwinds most of this leg.

307.3 Mostly City Driving 14.39 mpg
317.3 Mostly City Driving 13.52 mpg

Trip to Colorado Springs, Empty, Cruise set on 78 mph. Went over Raton Pass in Overdrive!!

205.6 Miles 18.50 mpg
244.6 Miles 19.1 mpg
138.1 Miles 14.62 mpg in rain, hail, strong headwinds (ah, didn't do 78 mph in the hail in case you're wondering

)

137 Miles Mostly City Driving 13.18 mpg

Towing trip to Ft. Collins and back Cruise on about 68-70 mph (this seems to be the sweet spot in terms of holding OD)

191.6 Towing 10.9 mpg
171.5 Towing 10.69 mpg
254.4 (151 towing, 103 sightseeing) 13.2 mpg
204 running around Ft. Collins mostly 16.52 mpg
159.6 Towing 70 mph, 92 degrees F 10.8 mpg
171.1 Miles towing hotter still, 20 mph headwinds 9.99 mpg
191.9 Miles towing still hot, 30 mph headwinds 9.55 mpg


With these short distances between stops, I ran this next tank down until there was barely enough fuel to wet the bottom of the tank in preparation for the install of the 45 gallon transfer flow.


386 Miles All City bump and go 14.8 mpg (I estimated 26 gallons here since it was really running on fumes)


523.3 Miles All City bump and go (still a quarter of a tank left) 15.99 mpg. Also added a bit of "Juice" just prior to this tank. Can't believe the mileage in light of the fact that I can't keep my foot out of it.

I had a 6.0L gasser that pulled this same Fifth Wheel over the same road and many times got barely over 6 mpg! ...and the "screaming!" 4,000 to 5,500 rpm a lot! Can't wait to make this same trip with Juice.


I'm a happy camper!

 

[tundracamper]

When towing a 7,500 lb TT plus family at 75 mph, my mileage is about 10 mpg. When I slow to 65 mph, that number jumps to 12 mpg. At just less than 60 mph, it is more like 13 mpg towing.

On the interstate, driving 75 mph with no trailer, I get about 20 mpg (or just under that). On average, around town, I get about 15-16 mpg.

 

[hoot]

My best so far was a run from Delaware County, Pa. to Avon, NC

20.8 mpg.

Average mixed is 17-18

 

[conradv]

Towing 3 ton of hay last weekend, 50 miles, relatively hilly, my trip computer showed 13.5mpg. It's usually very close to my log book.

I too can get 23-24 when flat, cruise, 60mph. Down to about 17 romping on it around town. Average right now is 18.5.

Pretty good for a long box crew cab.Edited by: conradv

 

[Diesel Pusher]

I find that if i keep the rpm's at 2,000 which yields a speed of about 73 mph, i generally get 19.50 to 20. Around town I get about 17 to 18.


I towed a car and trailer on an 800 mile round trip last fall and averaged about 15.50. The total weight of the trailer and car and gear was about 7,000 lbs.


I have never tried a long trip at 60 to 65...i suspect it would do over 20 mpg. I personally like to keep the rpm's at 2,000 and set the cruise.

 

[Stringer]

With my driving style, I get about 19 mpg combined city/highway. Truck has 28,000 miles, 265 tires, and doesn't tow. I'm no leadfoot, but don't baby it either.

 

[JEBar]

Best ever mileage 20.4 on an interstate cruise from Raleigh, NC to Knoxville, Tn. on which I made a deliberate effort to drive so as to get the best possible mileage. That means keeping rpm's below 2,000 thusly running about 64 mph. Speed is the enemy of getting good mileage in my truck. If I run at 70-75 she will drop to 17-18 mpg. On a 5,000+ pull this summer of a 10,000 lb travel trailer, I averaged 12.4 mpg running mostly on cruise at 62-65 mph. I keep a log on every drop of fuel and/or anything done to my truck. Mileage figures have increased an average of .5 to 1 mpg since the addition of a post OEM fuel filter at about 41,000 miles ... Jim

 

[03BlueHD]

03 Crew, 4500 miles, Hot Juiced, been carefully watching mileage for last month. Low of 13.6 (When I first got the Juice) and a high of 18.8 (highway at 70-75MPH). Average for all driving is 16.0. Overall I pretty happy with that, better mileage than my old 5.3 and a boatload more power.


I think that with different driving style, I can get better.

 

[hoot]

Proven fact 03BlueHD,

Mileage improves with age.... Dmax trucks that is.

 

[Micheal Tomac]

My best with the juice and stock tires was 20.95 mpg @ 75mph from Minneapolis, MN to Elkhart, IN on the 80/90 toll road. All highway with some toll booths thrown it around Chicago.

 

[MCourson]

Average 20 mpg In a 2003 2500HD Ex cab short bed 2WD with stock duramax and allison.