I have a 2008 F250 4x4 with a V10 , im running on 37inch tires with 6in lift so I know Im not going to get 15+ MPG but Im curious as to was mods people have done to a truck like this and what kinda MPG improvements they have seen...Im averaging 8-10 MPG and im not hard on it and i baby the truck. Thanks for the help

 

It's easy. Put diesel in it.

 

Put a Y pipe on it..

 

Go back to stock size tires and stock height

 

You don't need a Y pipe, the '05 and newer trucks have a much better designed exhaust system. As was said before, the lift and big tires are killing your MPG. I would say you are getting good gas mileage for what you have.

 

yeah your mileage isnt bad with that setup. Thats about what im geting on 34.5" tires. Clean your MAF sensor if you havent.

 

I average 10.3 now with no lift and 285's.

 

Regear your axles, but at the cost of that it will take a very long time for it to pay off.

 

Welcome to FTE!!!


Thinking the same...with going with gear change. Speaking of gears...airborne...what gears you running?

Another thought...is go with 5-Star Tuning. They are an FTE sponsor...and know the V10 3v personally.

Got a V10 Ford F250/350/450/550?


Good luck with it...


biz

 

I drive a lot of freeway miles unloaded and average 10.5-11mpg. You're doing great with your lift and tires.

 

Ok thanks I thought people was averaging 12-15 with my setup ... Not sure what gears are in it due to me buying the truck as I described ... Does anyone have a 5 in exhaust on there v10 is so did it improve mpg any ? Also what about cold air intake will that improve my mpg

 

5" exhaust is WAY too big, if anything it will hurt your performance and MPG. CAI won't do anything but lighten your wallet. Unfortunately, a lift and big tires kills your gas mileage. Nothing you can do about it. As they say.....If you wanna play, you gotta pay!

The 5 Star tuner may help a little bit, but othe than that the only thing you could really do to improve your mileage is put the truck back to stock height and put stock tires on it.

 

Another thing, was the truck ever reprogrammed for the larger tires?

The 37s are roughly 12% larger than stock. If the truck wasn't reprogrammed, your speedometer is reading 12% lower than your actual speed and the odometer is racking up 12% fewer miles than you are actually traveling, which also means you are actually getting about 12% more MPG than what you are figuring.

 

To my knowledge the truck has never been reprogrammed , I know my speedometer is off by about 5-8 mph but I did the calculator math on the mpg and I'm getting around what the dash is telling me

 

Your odometer is off also, so the computer thinks you still have stock tires. Also I would bet your trans is shifting at the wrong times.