Road Trip MPG question

[Gregs24]

Here in the good old UK I managed 32.2mpg on cruise control on a mainly motorway trip at 70mph. In France recently where the motorway speed limit is 130kph (82mph) I managed 31.7mpg on a 370 mile trip. That is on 97RON fuel in a 10 speed auto and obviously UK gallons not US so equates to 27mpg in US.

I think that is pretty amazing for a N/A 5.0 V8

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[505bbjason]

Computer says 28.5 at 67 for me, 75 would get me down to 27.1.

‘19 A10 PP1

 

[FightingFalcon]

Last Weekend goin north, fast and uphill for 300miles i managed 20mpg.
Coming Back goin south, no more than 93mph i got 23,5mpg.

Fastest part, twisties in the mountains and often over 150mph averaged around 17mpg over 160miles.

 

[bnightstar]

I traveled 420 km with 1 tank fuel of 50 litres or an average of 11.9 l/100 km or 19.77 MPG and this was with an average speed of 120 km or 75 mph. So I don't know how you guys get this numbers but this. was totally babying the car as much as possible as I had to travel over 800 km this weekend.

 

[Mazman]

Did a 620 mile trip during the weekend
Trip computer says 23. 7 mpg average

Have a pic from half way

 

[lacanteen]

Just completed a road trip of just over 3000 miles. Lafayette, LA north to Ft Smith, AR. Then west on I-40 to Flagstaff, AZ (75 MPH). South on I-17 to Phoenix, Then I-10 east back to Lafayette. Cruised at 80 MPH through most of TX. MPG for the trip was 32.6 MPG adaptive cruise 90% of the time.

2018 EB Premium, all stock and mostly 91 Octane fuel. Did not see much 93 octane on this route.

 

[Abb0nz]

How are y'all getting these MPG figures? From the car itself or by calculating fuel used and miles driven? If it's just by the car then it's probably wrong. Mine was reading almost 10% high until I adjusted it. in the engineering screen.

 

[FightingFalcon]

Yep, fuel used and miles driven.

Tried to adjust the reading for a few times, but it never worked out for me.

 

[jdsfly]

With all these nice mpg numbers, folks need to specify if they adjusted the AFE bias to reflect actual mileage calculated at the pump. Ford likes to estimate about 1-2mpg high from factory.

How do you adjust the AFE bias, to make it more accurate? Mine usually displays .5 - 1 mpg higher than I calculate.

 

[FightingFalcon]

Pretty Easy!

Push and Hold the "Ok" Button on the steering wheel with your left hand.

Start the Car until "Engineering Test Mode" pops up in the Dash.

Cycle Throught to Fuel Bias.

Normally the setting is 1000.

You have to calculate your optimal setting.

Divide your shown consumtion (TC) with tyour calculated one and multiply with 1000

for example:

shown Value 9,8L/100km
real Value 10,05L/100km (its the same for MPG)

9,8/10,05x1000=975


You have to try for a few tanks to get it set correctly.

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