REAL World MPG's

[WolfLMM]

Just got back from a 300 mile one way tow, with 13,800 pounds in tow.

I averaged, 5.43 miles per gallon. This LMM is the worst fuel sucker I have ever owned. Hell, the boat I was pulling gets 2mpgs at 750hp... I am going to have to use the LB7 for the tow back.

 

[lotsofmiles]

how fast were you going?

that is horrible

 

[WolfLMM]

Oh, 70mph in 5th gear.

 

[calabria69]

so how was the 07 lmm for mileage, see u sold it and bought a newer one?? and selling the lb7, but using it now cause the lmm sucks?? im confused....just going off what you have posted in ur sig....that is the worst mileage ive ever heard of

 

[JoshH]

so how was the 07 lmm for mileage, see u sold it and bought a newer one?? and selling the lb7, but using it now cause the lmm sucks?? im confused....just going off what you have posted in ur sig....that is the worst mileage ive ever heard of

x2. When it was stock my dad's LMM got around 9 pulling a 32' triple slide 5th wheel camper that weighed in at about 14k lbs.

 

[WolfLMM]

so how was the 07 lmm for mileage, see u sold it and bought a newer one?? and selling the lb7, but using it now cause the lmm sucks?? im confused....just going off what you have posted in ur sig....that is the worst mileage ive ever heard of

Its complicated, I do a lot of vehicle swapping with my business. The LB7 and the 09 LMM belong to me. That 07 belonged to MRI, but we sold it and bought a Dodge. I never even drove that truck, so I cant comment on it. I am sure it was the same.

I wanted a new truck, so I bought one. You know how that goes.

I am assuming the LB7 will do better, But I do not know that.

BTW truck has 3,000 miles on it. I dont really see fuel mileage getting much better?.

 

[lotsofmiles]

5th at 70 had to hurt the mpgs

 

[WolfLMM]

In 6th the truck lugged bad, shifted in and out of 5th a lot too.

 

[moore428]

Something is wrong! It shouldn't have been less than 9 mpg. Take it to the dealer and bitch. MPG will improve with miles but it should be doing better than that.

 

[billygoat7c]

Our LBZ with a 13k TT behind it at 70mph and 5th most of the time (6th on flat roads) gets around 9mpg.

I have a friend who's dad has a 08 LMM that is stock and towing a set of jetskis to Wisconsin and got 12mpg at 80mpg...At the same time my friend was towing their X-15 Wakeboard boat with his 04.5 lifted/smarty Cummins at 16mpg. With just a snowmobile trailer (~6500lbs) he drops down to around 8-9mpg with the LMM.

 

[duratothemax]

5th at 70 had to hurt the mpgs

why??? The LB7's and LLY's have no 6th gear and they can easily get 13mpg towing a load like that.

for all intents and purposes, the 6th gear on the LBZ/LMM trucks really does nothing but lower cruising RPM's and highway noise. Yes the rpm is lower, but you still need X amount of HP to push a 7,000lb brick through the air. To make that X horsepower at 2000rpm vs. 2300rpm really doesnt use or save any more fuel.

LB7's and LLY's easily get the same, if not, better MPG's without 6th gear.

ben

 

[Redbowties88]

i heard about a fuel leaking problem during regen on some lmm's....maybe thats where some of the fuel went..

 

[othrgrl]

We got 13mpg towing over 10K to Florida and back behind Winston's 760+ hp 2.8 truck. That is horrible mileage......

 

[lotsofmiles]

why??? The LB7's and LLY's have no 6th gear and they can easily get 13mpg towing a load like that.

for all intents and purposes, the 6th gear on the LBZ/LMM trucks really does nothing but lower cruising RPM's and highway noise. Yes the rpm is lower, but you still need X amount of HP to push a 7,000lb brick through the air. To make that X horsepower at 2000rpm vs. 2300rpm really doesnt use or save any more fuel.

LB7's and LLY's easily get the same, if not, better MPG's without 6th gear.

ben

guess i better go get an lb7 if they can tow 13,800 at 70 and get 13mpgs


i personally dont see better mpgs towing in 5th

 

[bigfish_Oh]

I will have agree with most, I could not get that bad of mpg no matter what I done. Did you have extra wind drag?, a window, port hole, canopy sucking air in a pocket?

 

[JoshH]

guess i better go get an lb7 if they can tow 13,800 at 70 and get 13mpgs


i personally dont see better mpgs towing in 5th

When I moved back home from ID to TX, I was grossing about 16k and averaged 13 MPG running about 75 the whole way back.

 

[JustinD]

I love my LB7, always gets better mileage than my buddies newer Dmaxes!!!

 

[msjdgman]

Somethings wrong.....I ran a 700 mile round trip 6-7 weeks ago towing 17,500 lbs (25K gross) at 65 mph and got 11.3 mpg. I towed in 6th, cruise on, with the tow/haul on and it only dropped into 5th a couple of times.

 

[Red Dmax]

My LB7 would get 20mpg all day long.

 

[merlin5577]

5 mpg while towing 14K? That is pretty bad. I averaged 13mpg pulling 13K on a recent trip to VT and back.