MPG'S SUCK!!! HELP!!! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 05-26-2011, 03:36 PM Thread Starter
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MPG'S SUCK!!! HELP!!!

Alright I have a 2010 6.4 with afe intake, dpf delete and sct livewire with custo tunes (I think that the tunes are from inovation if I remeber right, but I buddy helped me get setup with the sct and it's been about a year now so the memory isn't that great.) Also I have a 4" superlift with 35's. My truck has 52k on it already and I an only getting 14-14.5 mpg on the highway (about 450-480 miles a tank) and if I have a 12k trailer I'm lucky to get 10!!! This sucks! I could get a 18mpg all day long out of my cummins and I love my ford, but if things don't get better I'll be switching back to a dodge.

A friend of mine has the same set up as me only with an edge race. I know that the edge won't make **** for power, but I've only turned my sct up once in over a year. He claims to be getting 16-17 highway and 13-14 pulling a 11k trailer. Will the edge give me better fuel mileage? If not what will.

Thanks for any advice, and remeber I DON'T CARE ABOUT POWER!!!! The truck is for work, and I drive a lot and fuel is killing me. I only want fuel mileage. I have a viper if I want to go fast.

2005 Silver Quad Cab, long bed, 4x4, 130k, 325/65's sitting on 18" Weld EVO Renegades, Crazy Lary! Standard Gauges, Dual Intimidator Batteries, and ATS TRANY Fully Built, 90HP Dynomite Diesel Injectors, headstuds and Arctic Twins, ATS Twin CP3'S and all of the other supporting toy's!!!!!

My go fast and do stupid things machine, 2003 Honda RC51, High compression pistons, valve work, rocker ect... dual K&N intake, Jardin 2 into 1 exhaust with heatwrap, powercomander, all steelbraided lines, shiftlight, steering stabilzer, carbonfiber frame sliders, Pinske suspension and alot more that I can't think of off the top of my head.
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post #2 of 6 (permalink) Old 05-26-2011, 04:35 PM
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Alright I have a 2010 6.4 with afe intake, dpf delete and sct livewire with custo tunes (I think that the tunes are from inovation if I remeber right, but I buddy helped me get setup with the sct and it's been about a year now so the memory isn't that great.) Also I have a 4" superlift with 35's. My truck has 52k on it already and I an only getting 14-14.5 mpg on the highway (about 450-480 miles a tank) and if I have a 12k trailer I'm lucky to get 10!!! This sucks! I could get a 18mpg all day long out of my cummins and I love my ford, but if things don't get better I'll be switching back to a dodge.

A friend of mine has the same set up as me only with an edge race. I know that the edge won't make **** for power, but I've only turned my sct up once in over a year. He claims to be getting 16-17 highway and 13-14 pulling a 11k trailer. Will the edge give me better fuel mileage? If not what will.

Thanks for any advice, and remeber I DON'T CARE ABOUT POWER!!!! The truck is for work, and I drive a lot and fuel is killing me. I only want fuel mileage. I have a viper if I want to go fast.
Is your buddy's set up the exact same as yours? 35's on a 4 inch lift?

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post #3 of 6 (permalink) Old 05-26-2011, 05:12 PM
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are you going off what the computer says ur geting or hand calculated, toping the tank off using the trip meter n toping off again to know how many gallons u used...also is ur computer adjusted to your tire size. If your speedo is off ur mileage will be off.

2002 Chevy Silverado 2500hd ec/lb 4x4, efi live with built transmission , k&n intake, Dual 5 inch stacks, intake horn mod, 315/75/16 Kuhmo Road Venture M/T.
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post #4 of 6 (permalink) Old 05-27-2011, 12:44 AM Thread Starter
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Buddies truck is on 35,s with just a leveling kit. Yes, hand calculated. The computer says 17 mpg. Way off.

2005 Silver Quad Cab, long bed, 4x4, 130k, 325/65's sitting on 18" Weld EVO Renegades, Crazy Lary! Standard Gauges, Dual Intimidator Batteries, and ATS TRANY Fully Built, 90HP Dynomite Diesel Injectors, headstuds and Arctic Twins, ATS Twin CP3'S and all of the other supporting toy's!!!!!

My go fast and do stupid things machine, 2003 Honda RC51, High compression pistons, valve work, rocker ect... dual K&N intake, Jardin 2 into 1 exhaust with heatwrap, powercomander, all steelbraided lines, shiftlight, steering stabilzer, carbonfiber frame sliders, Pinske suspension and alot more that I can't think of off the top of my head.
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post #5 of 6 (permalink) Old 06-01-2011, 08:09 PM
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A lot depends on your axle ratio, how fast you're running, wind, terrain and, when pulling a trailer, not only the weight but how much wind it catches.

My 2010 F250 4x4 CrewCab with stock 20" wheels & tires, 3.55 axle, DPF delete & Spartan 250 will do between 18 & 19 mpg (hand calculated) if I am on flat ground, no wind and running 70-73 mph.

Jump up to 75+ mph and it goes down to 16 to 17 mpg.

Add some hills and a good head wind going 70-73 and I get 15 to 16.

Add the hills & headwind and speed up to 75+ mph plus and I'm at 14 to 15.

Pulling my bass boat at 70 mph = 13 mpg.

Pulling my 8,000# 5th wheel = 10 to 11 mpg.

The new 6.7 is doing better, but not enough for me to trade-in my 6.4.

My friends running the newer Dodges are seeing 18 to 20 on the highway and only around 10 when they tow.
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post #6 of 6 (permalink) Old 06-07-2011, 06:25 PM
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I don't know if Mike at KEM can write something for a SCT, but it would be worth a call. $75.00 for a custom tune will pay for itself in no time. He wrote a 75HP tune for my Mini Maxx and I see 12+MPG pulling my 9600lb 5ver. The manual trans helps also.

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