lkennamer

Hey I gotta 2010 lariat super crew with the 5.4l flex fuel engine and I'd really like some help getting more power/ fuel efficiency outta it cause I'm lifting it soon(4-6") with 35s and don't want to get robbed to bad on performance and gas cause I get around 12 mpg right now stock please help me out thanks.

Mike Up

Sounds like you're getting robbed right now!! I'd change your fuel filter and air filter and possibly clean your injectors. I'd also start buying some better gas without the water and contaminants.

I honestly can't see how you're getting such lousy mileage. I consistently get between 15 mpg and 17 mpg. I've never gotten worse than 14.5 mpg EVER.

I'd have some fuel efficiency maintenance done right away.

Macken37

Um forgive me I could be wrong but I don't think the 2010s have fuel filters. Iv followed my fuel lines all the way from my tank to the engine no sign. The book dont say anything about changing it that I seen. I have a 2010 f150 adv mpg is 15.7

Mike Up

I'll look in to it.

Macken37

Except f series non super duty that means are trucks

Macken37

Lol u changed that in a hurry lol
Go get under ur truck and see if u can find it lol I tried unless I'm blind witch it very well possible. Lol any one know for sure?

jumpseat82

You probably won't get much better fuel mileage. I started putting in Shell Power fuel and have seen a small increase. I now get about 13.5 mpg. I drive mostly all city miles. Last winter I was getting around 11 with crappy cheap gas. Even if you do have a fuel filter which I don't know it shouldn't be bad with a 2010. Not sure how many miles you have.

jumpseat82

Mike Up, what year of truck do you have and motor to get that good of mileage?

johnwill

They have fuel filter but it is in the tank, integrated with pump and not user serviceable nor needed to change, supposedly lifetime filter.

lkennamer

What do y'all think about programmers/superchips, cold air and short ram intakes, exhaust systems, throttle bodies etc? Haha I'ma do anything I can to get the most power/mpg outta my truck once I lift it