LMM mpg?

[Billr]

Earlier in this thread, someone mention topping off the tank(s)(in our case). While I have found that the DIC is generally accurate, I also have seemed to note that the fuel temperature when pumped, and how much I coax all the foam out of the tank can make a large difference in both the calculated by hand and the DIC readings, sometimes more than several MPG. This also seems to affect the gallons used figures which would logically follow. While this may seem academic to some, we are out west where the fuel points, and the reasonable fuel costs, are very far apart. We sometimes push our maximum range with the 56 gallons we carry and 1 or 2 mpg, and a warm fuel load can drastically reduce how far you are going to get. We have noted almost a 100 mile difference in supposedly full tanks.

And contrary to what most people think, fuel temperature is NOT compensated for in California when you the buy the stuff. It's delivered temperature compensated but at the pump its at what ever the ground temperature is. Most dealers get several hundred (extra) gallons that is pure profit on every tanker load due to this. A recent offer by the main maker of Ca. fuel pumps to furnish free in new pumps, temperature compensation valves was quietly shelved recently. I suspect that fuel temperature (density) is a major culprit as it can vary by almost 20%. With fuel prices @ $4, a warm fuel temperature can cost you as much as 80 cents a gallon. Oddly enough, temperature compensation is by law in Canada. Does anyone have any information on this in other states?
Bill

[2008_WHITE_DURAMAX]

2008 gmc 2500hd crew cab short bed slt duramax with allison, 14.9 city - 18.9 hwy pushin 285/75R16 bfg all terrains

[07.5 Eddie Max]

I am getting about 17.8 mpg on my 2007.5 LMM, Running with no load. I installed an Edge Evolution Progammer and now, I am getting close to 20 mpg. Thanks 07.5 Eddie

[PinkoDiesel]

14.4 City / 20 highway

[daddysLBZ]

Does lettin all the foam out really help?? I've heard mixed reports about topping off but I'm not sure about it,please post info on topping off tank with letting foam out of it ,does it really make a MPG difference; TO TOP OR NOT TO TOP OFF fully and release the majority of the foam,What's the method?Please let me know,as an extra few MPG's would help any one on this forum...I would think this would apply to a 06 LBZ, If not,cool then, curiousity is killin' me. I get 16 in town & up to 22.6 when running 55 mpg, now running 70mph empty w/285/16 Iget around18-19mpg on freeway empty,when I tow a skid steer loader I get between 12.5 to 13.2 all around,stop or go driving beats up on your mileage,I keep it under 2,100 rpm's while towing heavy equipment,bobcats skid steer loaders,and small dozers under d5's,also I tow a John Deere 4wheel drive 40hp tractor w/ a front loader and a nice box blade...I know this thread is for 07.5 -08 LMM's, but I desperly need info on toppin or not toppin my tank,I'd like to know what the difference is between the two...THANK you very much in advance for your patience and advice,It truly is priceless!!!holla at me if ya need to via e-mail sup.erke@hotmail.com

[Buck]

my 08 LMM gets 17mpg hwy 12 city 8 towing single car inclosed trailer apx 8,000#

my buddys 08 LMM who he got from the same dealer off the same shipment gets 14mpg hwy 10 city and like 6 towing single car inclosed trailer apx 9,000#

i know back in the day you used to not want to get a monday car or friday car or something like that. does this still happen today? by the way my buddys truck is an EXC SB and mine is a CC SB and both are 4x4's.

[PinkoDiesel]

Are both hand calculating the mileage or using the DIC on the dash. The best way is by hand the DIC on the dash is always way off for me.

[IdahoRob]

I think different trucks just run better and get better mileage than others. Although I'd say most of the differences are in driving style.

[ronroper]

I just purchased a 08,3500 HD,4x4,crewcab dually.
The mileage is terrible,the best I have gotten so far is 13.333
What is the cheapest way to fix this problem without voiding my warranty?
I am really missing my 7.3,it ran between 17 and 19 stock.
Thanks
Ron

[NCC923]

21,000 miles...all stock except for lift and tires the way you see it...