youngjyg

you guys are lucky i only get 8 and thats not me even stepping on it

RoushNitemare

lol ya i average about 9 but i can get it up to 12 if i take it really easy and drive really smart like trying to never stop since that when you use the most gas, just getting the truck rolling

what year is your truck?

jhelrey

Plus, you are letting the vehicle warm up more when it is cold... defrost, etc...

Keeblerz28

Any trouble codes? If you don't have a code reader or an Edge, a lot of autoparts stores will read the codes for you. Just another possible cause of decreased gas mileage, in addition to the cold weather, winter gas, maintenance items, driving habits, etc etc

youngjyg

its an 08 fx4

fx4tonka

I've noticed the same problem as of late. I'm blameing it partly on the winter but I am also leaning towards a tune-up as I have 115000km's on the stock plugs.

Tannerpford

I pulled the codes with my edge chip and nothing.

PJB

Ive been getting 12-13 lately and I mainly drive on the highway. Over the summer I was getting 14-15.

Last winter was the same deal though, 12-13 so I guess its normal for the mileage to drop a bit in the winter.

Ruprecht

Last fall I noticed a sudden drop in fuel economy. 14.5mpg one tank, 12mpg the next, 8.5mpg the next tank. Took it into the dealer and their diagnostics showed one set of valves was running rich. Ended up getting new rocker arms and cam phasers, along with spark plugs. Good thing I had an extended warranty. Back up to 14.5-15 mpg/city on winter gas. If you're down under 10 mpg I'd consider having your mechanic hook it up to his diag. computer.

youngjyg

it could also be a tune its only been like this for me after i got mine done