Oh the pain. Upgraded to an F-450. Going from 21 MPG to 15 MPG hurts!! Going from $4 a gallon to $5 a gallon hurts even more, but the power, oh boy, the power. Can't tow a 5th wheel with the F-150, at least not the 5th wheel I have. At least I get better MPG than the previous owner did, 9.2 MPG. With any luck the truck will learn and adapt to how I drive and start to improve.

 

Get about 14ish in mine, lift and big tires got my MPG

 

Almost 4 years with my 2019 4x4 3.5L Eco Screw, 6.5 bed - lifetime is 19.6, recent average is 20-20.1. That's pretty consistent with little towing, reg gas, and 80-90% highway/country roads.

 

So have had my 2017 for a while now, about 35,000. No matter where I drive, it settles at either 18.3 mpg or 18.4. It a Supercab XLT 5.0 4x4. I’ve never reset it. So we are taking a long trip now, from Illinois to Arizona. I reset one of the trip computers at the start. Some not so favorable winds things went down about 1 mpg but things gradually went back to exactly 18 .4 mpg long term and 18.3 on the trip. When heading back east it may go up with some tail winds but I know eventually it will settle back where it’s always been.

 

I’m coming up on 2 years of ownership of my “17, SCrew, 5.0. It’s a 3.73 gear truck, with 275/70/18 BFG KO2’s on it. Mileage over the coarse of an oil change(5000ish miles) is 18.1 when running premium fuel. It’s 13.1 when running E85.

 

Just did a trip from AZ to Yuma so freeway and average MPG was 15mpg normal speeds at 75-80 is this normal for this year engine?

 

Going 75-80, yes. Slow down if you want better fuel economy.

 

Pushing a heavy brick through dense air usually consumes a vast amount of fuel. If you want decent MPG, keep it to 65 or less.

 

I have found that in my 2004 Lariat (5.4, 3-valve) while driving the Interstate, if I keep it at approx 64 - 66mph, I can see as much as 23mpg. But if I run upwards of 75 - 77 my mpg's drop to like 16 - 18.
So yeah, a "lead-foot" has a lot to do with mpg.

 

been driving a 19 with a 2.7 for almost 2 years, 20,000 miles driven i hand calculate around 21.8 mpg. Salesmen told me i HAVE to run midgrade fuel (91-93 octane around here) because i'll smoke the valves if i run regular (89)?
a friend has a 2.7 in her explorer and has ran regular (89) since brand new when they ordered it in 19.

safe for me to run regular?