[chiefdave]

With my daughter flying in for the Thanksgiving holiday I put on a lot of highway miles and was able to get an idea of fuel mileage on the new truck. 500+ miles of hilly Ozark terrain @ 60-70 MPH limits. The dash read 27.6 but hand calculation was 26.2. Not too bad on winter blend fuel. The amazing thing was that with all of the long, steep uphill grades the transmission never shifted down. My '17 5.0 6 speed would always downshift 1 and sometimes 2 gears on several of these hills even with 3.73 rear gears.

With the trip meter being 5.3% optimistic is there a way for the computer challenged to calibrate it.

 

[JIM]

With my daughter flying in for the Thanksgiving holiday I put on a lot of highway miles and was able to get an idea of fuel mileage on the new truck. 500+ miles of hilly Ozark terrain @ 60-70 MPH limits. The dash read 27.6 but hand calculation was 26.2. Not too bad on winter blend fuel. The amazing thing was that with all of the long, steep uphill grades the transmission never shifted down. My '17 5.0 6 speed would always downshift 1 and sometimes 2 gears on several of these hills even with 3.73 rear gears.

With the trip meter being 5.3% optimistic is there a way for the computer challenged to calibrate it.

my 2012 xlt with 5.0 did the same thing but my 2019 3.0 with the 10 speed cruises great don't notice shifts .For a better MPG run the Ford cetane booster/cleaner with every tank Iam getting 30mpg highway plus ,21 to 24 city all the time I also put a cleanable K&N stock replacement air filter in also.The cetane additive with cut down on it going into regen as often .

 

[STIAJW]

To address this question: "With the trip meter being 5.3% optimistic is there a way for the computer challenged to calibrate it. "
See this post (admin - please remove if not appropriate):

Fix the inaccurate MPG display in 2 minutes! - Ford F150 Forum - Community of Ford Truck Fans

2015 - 2020 Ford F150 - Fix the inaccurate MPG display in 2 minutes! - The LOM is known to be pretty inaccurate for most of us. The good news is that you can fix it quickly and easily in 2 minutes with no tools if you know roughly how far off it normally is... This was posted on another forum...

www.f150forum.com