Usually I stay below 70 and avoid getting run over on the interstates in Arizona which are posted at 75. This can be challenging due to most others running 80 plus
. I was just curious if there was a break-in period having never owned a Ford V-10. My past experience with new vehicles has been to change out the air filter at 3000 miles with a Fram. I have found all of those air filters from the factory to have some type of oil fouling and replacing usually will improve the fuel mileage. The Full Synthetic also seems to help
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