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In summer my Fiesta is better on the Interstate at 60-65 MPH. In winter I can usually do better on my lower speed route. Higher speed aero drag and colder intake temperatures cost me about 10 % on the Winterstate (intentional). The threshold is at 55-60 degrees ambient temp.
The only fuel consumption I do not record in my log is when (very rarely) I loan my truck to my neighbor so he has reliable transportation while his truck gets fixed. He returns the favor when I need a little help with something like unloading a new motorcycle purchase.
regards
Mech
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