That's what Im getting with my truck with bigger injectors and untunned. This is not the MPG you should be seeing with a stock truck

 

Sounds like you need a tune up. My milage was about the same as yours when I purchased my truck. After some new NGK plugs, air filter, and a fuel injection service I niw get 20 hwy, 16-17 mixed and 14-15 all city.

 

I'll look into it when I get my oil change at 9,500 miles (I'm at 9,200 now). I know the air filter is clean, I bought an aftermarket drop-in. Not sure about the rest.

 

What brand is it? It could be something that is poorly made/fitted and restrictive. If it is K&N, Airaid, AEM or even Spectre then I wouldn't worry about it. Just wondering!

 

Did a 400 k (250mile) trip from Ottawa to our super-secret Nuclear facility this week and averaged 11.7 l/100k (20.1 MPG), driving at 95-110 kph (60-70 mph). A/C running most of the way back, but not on the way up. Truck lightly loaded with just my inspection tool and riding gear in the bed.

 

Wait, what? It's not a secret anymore!!

 

It's an AMSOIL nanofiber filter. I did some research and only heard good things. It flows a lot better than the stock drop-in.

http://ww2.amsoil.com/shop/by-produc...a-air-filters/

 

i got 19.0x mpg today!