12.9 mpg city
09-27-2014, 03:31 PM
#11
Member
Thread Starter
Two things I see:
1. 1200 miles - let it break in! You probably won't start seeing a mileage increase until about 6k miles, so don't sweat it just yet.
2. City - trucks hate city driving. Stop and go requires a lot of energy to move a big vehicle like that. Combine that with it being new and 13mpg is totally acceptable to me.
3. Bigger tires - regardless of the fact that they're only slightly bigger than stock, there's a lot more rolling resistance from those tires since the deeper tread means more air passing through the tread blocks, which creates more friction. Also, since they're larger than stock your computer might not be reading speed and MPG accurately.
I'd suggest giving it a little more time and breaking the engine in.
1. 1200 miles - let it break in! You probably won't start seeing a mileage increase until about 6k miles, so don't sweat it just yet.
2. City - trucks hate city driving. Stop and go requires a lot of energy to move a big vehicle like that. Combine that with it being new and 13mpg is totally acceptable to me.
3. Bigger tires - regardless of the fact that they're only slightly bigger than stock, there's a lot more rolling resistance from those tires since the deeper tread means more air passing through the tread blocks, which creates more friction. Also, since they're larger than stock your computer might not be reading speed and MPG accurately.
I'd suggest giving it a little more time and breaking the engine in.
Good points. I'll give it some more time........I really like the truck just hope the mpg improves.
09-27-2014, 06:41 PM
#14
Mpg
My work truck is a 2014 xl super cab 4x4 3.7 auto. It has the stock steel 17" and stock tires with 3.73 gears. It gets 16 mpg all the time in the city and 19.7 mpg on highway running 75-80 mph. Just now has 6k miles. Wonder if the heavy 20" and maybe differnt gearing playing a part in yours. I average 650-700 miles per tank highway and 550-600 miles a tank on all city and job site running. I actually have not burn a complete tank on all highway yet, so the 19.7 is 20/city
80/ highway
80/ highway
Last edited by 505hp; 09-27-2014 at 06:49 PM.
09-27-2014, 07:19 PM
#15
Senior Member
13 eco fx4
09-27-2014, 07:40 PM
#16
Senior Member
Good to know my old 5.4 with 60k on it can stack up to the new 5.0 and eco. I get 14-15 city and 18.5-19.5 on highway with 3.55 gears and stock 20" wheels. To be honest I traded up from an 04 Explorer that I had driven 10 years and it got worse mileage than my truck. If I wanted good Mpg I would have bought a compact car. Complaining about bad Mpg while driving a 5,000+ pound vehicle is kinda silly.
09-27-2014, 08:08 PM
#17
Senior Member
Well, 1" taller probably means ~3% larger diameter so whatever mpg you are getting * 1.03, that 12.9 becomes 13.3 Still not great but better. AT's are definitely heavier, even at stock size, heavier tires will reduce mpg (and more aggressive tread compounds that).
How you drive makes a huge difference too, 'city' driving speed is usually less of an issue than how you accelerate. Hammer down = poor mpg, couple that with the tires and it is even worse.
How you drive makes a huge difference too, 'city' driving speed is usually less of an issue than how you accelerate. Hammer down = poor mpg, couple that with the tires and it is even worse.
