nes999

I have a 4.6L 2009 f150 and I've been looking at lifting it. I currently am get roughly 15mpg. If I were to slap a 6,5inch mcgaughy lift and a 35inch tire on it, how much mpg would I expect to lose? This is my daily driver so I wouldn't want to lose to much gas mileage.

If it matters my I'm geared at 3.73.

uzikaduzi

you're obviously increasing air resistance and rolling resitance which hurt fuel economy; however, you are raising gearing which should help if you're mostly highway driving. most people report a 1-2 mpg loss with a lift and 35's; however, I wonder how many of them have a correctly calibrated speedo... if the speedo is off from larger tires, the odometer is off as well so you're actually traveling farther than the odometer is reading so that 1-2 mpg is actually an over estimate of fuel economy loss.

nes999

If I lost 1or 2 mpg I would do it in a heart beat. However, 5 to 8 Miles lost and I'd need to do some serious thinking.

Take.ErOff.The.Road.

I haven't noticed a huge difference between gas mileage since driving a lifted truck compared to stock and mine is my dd too. But the changes I do see is when it's sitting at a quarter of a tank, it drops a lot faster than the stock truck does. It also uses more gas when it's really windy out, moreso than stock vehicles, because like uzikaduzi said, it's the air resistance. You're sitting higher up into the wind.

uzikaduzi

I don't think you'd lose anywhere near that unless something was wrong... i had a pretty significant exhaust manifold leak running 33.5's with a 3 inch level and without the speedo being re-calibrated I lost a little over 1 mpg (which is less since i'm driving further than the odometer is reading) i could feel a huge power difference with the exhaust leak so I'm sure i was using more fuel to compensate too.

rplatt2189

Running 6" lift with 35/12.5/20s and im avg 16.5 in city. 2013 XLT with 5.0

slcoffroad

2007 6inch 35 inch tires, 10 city 15 highway. Looks sexy as hell but gas sucks a lot

nes999

Did you have regear for your 35s?

bzzr2

you guys must have a brick under the gas pedal with a 6 inch lift and 35's to say you're still getting 15+mpg, i barely get that on my new 5.0 with a 2 inch all around lift and 33's, drive it like a gramma.... def notice in wind it uses more fuel.

uzikaduzi

not sure on the 09 with the 4.6l but does it have a 6 speed or a 4 speed trans?... the power loss is pretty subjective but my wife's 08 with 33's 4.6l 3.73 gears 4 speed trans is pretty weak. I'd imagine you'd get by fine with a 6 speed trans w/o regearing.