David Minniss

I live in California, and drive about an 1.5 hrs to and from work every day. My truck has 100k + miles, and I am consistently getting 14.3 MPG. The dealer just performed my 100k service, and replaced the spark plugs. Thinking about getting a SCT X4/7015 tuner. I know that will give me more HP, but how about gas mileage improvement? Any thoughts?

David

Blown F-150

I wouldn't bank on it. If you spent $400 on a tuner just for mpgs', it's going to take some time to get that investment back. However, if you want more performance, it may be worth it. The side effect of making use of the more performance is your MPG's will suffer.

I run a 87 performance MPT tune. Depending on the situation, I saw a jump int 1-2 mpg's using cruise on the highway (65mph).

berty

Even if you were able to squeeze a MPG or two, it would take a couple hundred tanks of gas to break even from the tuner purchase

Gx2Lariat

I get much better mpg on the interstate with my 5* 87econ tune. However, I think they change the speedometer setting because to say your going faster than you are.

But, if you want better mpg try cruising at +10mph slower than usual and see what happens.

Science shows that for every mph faster you go, the mpg falls more and more exponentially. Cars/trucks are typically rated using 55mph. The drop of in mpg from 55 to 70 is amazing.

Tallguy5.0

Definitely agree about the speed. I had cars before my '13 XLT and would always cruise at 80. Now I set cruise to 65-70 just to save gas. It's noticeable for sure. I've been driving 42 miles each way to work and got 21.1 on my last tank.

David Minniss

Thanks Blown F-150
I guess I'm really wondering why my gas milage is so poor. I'm not exactly a led foot. Was hoping the spark plug change might improve it a bit, but not at all. It's funny, I see Ecoboost owners saying they get much better gas mileage than I do. Wonder why that is?

Adam013085

Where do you drive? How fast do you drive? If its a lot of city driving then expect less MPG, if you are driving 60+ MPH you are going to see your MPG suffer as well.

David Minniss

About half highway (60 to 65) half city.

admlshake

How fast do you take off from a stop? I used to have a pretty heavy foot at take off, started going easier on it and noticed an improvement in my MPG. From my experience it's usually a lot of little things in your driving style that will make the most difference.

SteveLord

The performance increase shouldn't make it any worse. But you'll like that so much you won't care. Trust me.


If you want to save on gas, move to another state.