What can I don for MPG? - Ford Powerstroke Diesel Forum
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Old 04-08-2010, 07:37 AM
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What can I don for MPG?

I have a 06 F250, 8" lift with 38's. Have a edge programmer with screen, 4" exhaust and K&N cold air. I am not crazy about the edge programmer, It don't run right the first time I drive the truck that day, Once it gets going it fine but the first drive of the day it don't want to shift and real weak feeling. So I put the stock tune back in and have it there if I need it. I havent hand calculated the mpg but the factory is showing its getting 13 to 14 highway. The problem is I don't drive highway alot. What are some suggestions on bumping the mpg up. Im new to all of this diesel stuff. If I could get the mpg up I would keep the truck.
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Old 04-08-2010, 07:40 AM
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what gears are you running in the diffs? ditch the edge get an sct with custom tunes on it from innovative, elite, ect... also get gauges. boost trans temp adn egt at the min trans and EGT.
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Old 04-08-2010, 07:41 AM
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Seriously.....you didn't buy a PSD with 8" lift on 38" tires and expect to get good MPGs did you?

If you get 14-15 you're doing good, IMO. Your gauge/MPG is not correct as its not corrected for big tires. You have to adjust. Your adjustment is somewhere in the 15-18% range higher(off the hip here, didn't do math to figure it out for you) than the gauge tells you.

If you're running around town a lot, don't expect much above 12 mpg....its a big, heavy truck, moving it from a stop takes a lot of energy.

if you want to drop another 500+/- bucks get an SCT with some custom tunes and that might help some, but really....if you want better MPG, lower the truck to stock or get a car. I would doubt, despite everyone's praises that you're going to get a lot more MPG out of a tuner- you get more power and a little more MPG...
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Old 04-08-2010, 07:51 AM
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The biggest thing against you for "good mileage" is your lift and tire size. Looks cool no doubt but kills mileage. consider a lower lift (4" or leveled) and 35's if you want better mileage - or even 33's for even better mileage. Still - these trucks are heavy - good mileage is tough - can be done - but tough.

I run a Banks 6-gun level 4 with 33' tires and leveled and average 16-18 around town and 22 tops on highway empty keeping my highway speed near posted.
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Old 04-08-2010, 09:28 AM
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Yea, I knew it wasn't going to get the best mpg when I bought it but I would like to help it out some. And I know not having the programmer on doesn't help but something aint right about it so I decide to leave it off. Truck still has stock gears, does it help to change the gears? I would be happy with 13 or so city mpg, but I know I don't get that. That is why I am asking for some advice.
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Old 04-08-2010, 10:06 AM
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I get 11-13 in the city tuned driving the way I do. I have 35" tires and stock gears. I doubt I could do that with that much lift and those tires. If you want to drastically improve your trucks mpgs. Get a bicycle and ride it often. You will spend a lot less on fuel.
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