Regular unleaded. I have a
Regular unleaded. I have a 2012 F150 with EcoBoost. I've seen great mileage in warmer weather - 23 to 24 pure highway mileage even. However, cold weather will drop it significantly. Expect only up to 19 to 20 highway in cold weather. In fact, I drove 140 miles today with one stop and it got 18.5 for the most part - cold today 32 to 36 - very windy. The engine noticeably runs at a higher RPM in cold weather for a few miles even after a short warm up after start (letting the idle kick down). It runs about 2000 rpm at 65 to 70 until a few miles and then drops to 1700 or so. This has to burn more gas and explain the mpg drop - at least in part. Bottom line - over 1.5 years of having the truck since new - it's second trip computer (Trip B) was used to track mileage from new - 19mpg - dead on the advertised combined mpg. I commute highway to work - 14 miles each way - but also use it for trips to the dump, grocery getter, etc.