2010stx4by4

2010 XLT, 5.4, 4x4,3:55 rear end I average about 15 mpg city driving , light foot. Also have a 1.5" level with the stock size tires.

I averaged 19.8 mpg on the trip I took to Branson,MO about 2 months ago and that was at 65-68 mph.

Edit: I had me and 3 others and luggage on this trip.

Mr_P0L0

2009 F150 5.4 with 3.55 rear end. I get 18-19 mpg with cai and borla exhaust. I had the pcm flashed with a new strategy and seems like a different truck. I have 305/30/26 tires. Im currently waiting on new tunes from Mike at 5star tuning. I suggest to use marvel mystery oil in a few tanks or seafoam with quality 87 octane. That should help out some.

Royderjd

First [MENTION=119060]McCarthy[/MENTION] It must be nice to not have to think about things. But I see a problem. So I'm Addressing it, after I found out if I have the right tire size in the trucks computer then I can get a more accurate reading of my mileage. I'm not looking for some Super Huge Gains just simple ones hell a mile a galloon is a lot. So yes it's a Prius, it's my truck I'm taking Alaska and Gas is more expensive up there. So i want to make sure I getting a good Bang for my Buck. Did I lose you anywhere?

Second [MENTION=156632]mikeyfitz[/MENTION] I agree to also. I know the biggest difference is my foot and trying to do some hypermileage. But one step at a time and see if my tire size is the problem, well not being correct in the computer.

Royderjd

I just looked up something its a Flex Fuel E85 vehicle. the PDF i just looked at http://assets.forddirect.fordvehicle...B9E84927B9.pdf say its only suppose to get 10 city and 13 highway.

interesting...

gDMJoe

For your particular EPA estimates consult your window sticker.

Don't have one? ... .

Royderjd

http://fordlabels.webview.biz/webvie...FW1EV2AKA74917>

that makes me feel alittle better

mrgooden

thefinishedproduct.com/Lead_foot.jpg

BlueOvalLove

Why don't you hand calculate your mpg, and see what you are really getting and eliminate the computer from the equation...

boy_welder2000

I get 15.5 mpg with a 50/50 mix of city/highway. Truck is all stock. See the link in my sig for details.

rbrais

That's most likely running E85. It gets less mpg than standard gas. But...10 to 13 = 11.5 avg, so that may be standard gas. I still feel that's low. If I can get 12 with a lift and 35's/3.55 gears.....