RadioMan

2010 F-150 XL, 5.4 V8 and tow package.. No problem with the truck at all but I'm beginning to wonder if the trucks in dash MPG reading is correct.

It now has 18k on the clock and I don't baby it on turnpikes or state routes. 80 MPH is the norm. I get passed even at those speeds. It used to get 14 MPG at those speeds. The ONLY thing I have done was I made up my own "Cold Air Intake" system. I even used the factory air box because it is already drawing cold (not under the hood) air from under the left fender. All I did was remove the cancer looking 3 inch plastic tubing and replaced it with a 3 inch chrome tube, 60 degree 3 inch chrome tube and used three rubber couplings to hook it all together.

I really didn't notice any gain in "Get up and go" but I did like the new sound from the intake. Mileage stayed about the same until I took a fast 80 MPH plus trip from NW Ohio to the U.P. of Michigan not pulling anything..

Even at the high speeds I noticed the in dash readout coming up and up. It went from 14 to 17.2 to the gallon. Coming back (same speed) it went to 17.3 to the gallon. Town driving has not brought it down at all, yet.

So, what are your thoughts about the in dash MPG readings? Maybe I should do it the old way, fill up, right down mileage, fill up again and so on, the old school way?

The O N L Y complaint I have about this truck is the slowness of the computer system. You can push the gas to the floor and count to almost two before the engine responds. No, it does not have a turbo system. When I tell the dealership about this all I get is the blank stare look. lol

Thanks for any replys...

kchill93

Mine is pretty dead on. It was within a tenth when I have hand calculated it. So I trust it. Only thing done to my truck is leveling coilovers and 33" tires but stock width.

21RRF150

iTrader: (1)

My 2010 mpg reading is always way off. Always by at least 2 mpg's, can be up to 3-4. I've posted about it numerous times, no real fix. It's not that big of a deal to me.

Today I filled up and hand calculated. 500 miles on my trip, 29 gallons to fill equaled 17.2 mpg. My mpg reading is 19.3.

RLXXI

A programmer with a custom tune will fix your accelerator hesitation. Will also unleash the power Ford purposely leaves off the table.

TorontoFireGuy

I find mine is bang on unless I do a lot of idling.

Z7What

Going on vacation last year my dash said 19.8MPG, hand calculations showed 18.8.

Wayne

uparms

2013 SCAB, 4x4, 5.0.

Mine is within a 1/2 mile MPG. Computer vs. iphone calculator. During last 3 fills on a 17,000 mile truck.

mack3748

sorry to be the Canadian in the room and go by litres per 100 km, But I noticed mine jump on average on the highway when I switched tires from general grabber HTS to Cooper AT3's. went from an average of 11 to 14 L/100km. I expected a bit of a jump but not that much. And the old hand calculation has it off by just off by just a bit. .5 L/100km

Willhahn2001

If your tires are bigger than what came with it then the mpg would be off. Calculate it manually for the most accurate.

dac79

Mine is a '10 FX4. I have always had a difference between my calc and the dash readout. I have a tune which gets rid of the throttle lag and I have also dialed my spedo in via a garmin GPS for the tire size difference. The dash readout is always 1-2 L/100km less than the hand calc.