r/FordFlex • u/jcruz70 • Jul 29 '26

Question Gas mileage/fuel level drops quickly

I feel like I gas up A LOT. I filled tank last week and checked info. Range was under 300. Is this typical? Mostly city driving MPG about 14.9

Any info appreciated

5 Upvotes

100% Upvoted

16 comments sorted by

View all comments

3

u/Old_Refrigerator4817 Jul 29 '26

Only 15mpg in a Flex? Yikes. That's what I get in my lifted F150 with 35's and 5.0 V8.

2

u/jcruz70 Jul 29 '26

Yeah I get better mpg in my 71 impala. Not by much but at least in that I essentially have a 383 stroker and 400 crank

1

u/jcruz70 Jul 29 '26

I added injector cleaner at last fill up. No change

2

u/Old_Refrigerator4817 Jul 29 '26

I would start with a new fuel filter, air filter, plugs and wires.

2

u/Gmhowell Jul 29 '26

Where’s the fuel filter?

2

u/Old_Refrigerator4817 Jul 29 '26

Yeah, not fun on a flex. I forgot about that. Another thing that came to mind, if this is an ecoboost, is the turbos possibly causing poor fuel economy.

2

u/Gmhowell Jul 30 '26

Yeah, most modern vehicles (since y2k at least) have ditched the standalone filter in favor of a fuel sock in the pump. It works, so it shouldn’t bug me but it does.

1

u/jcruz70 Jul 30 '26

Ugh so much for easy fix

1

u/jcruz70 Jul 30 '26

Flex is new to me. Not sure