Road Trip MPG question

Discussion in 'Mustang S550 General Forums' started by Dusten, May 7, 2019.

  1. Gregs24

    Gregs24 Well-Known Member

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    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
     
  2. 505bbjason

    505bbjason Active Member

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

    ‘19 A10 PP1
     
  3. FightingFalcon

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

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

    bnightstar Well-Known Member

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    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.
     
  5. Mazman

    Mazman Well-Known Member

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

    Have a pic from half way
    20190520_135726.jpg
     
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  6. lacanteen

    lacanteen Well-Known Member

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    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. 039.JPG
     
  7. Abb0nz

    Abb0nz Well-Known Member

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    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.
     
  8. FightingFalcon

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    Yep, fuel used and miles driven.

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

    jdsfly Active Member

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

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    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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