Gas milage problem
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Gas milage problem
I bought a 2018 3.5 Eco Boost FX4 this past summer. It was getting 17mph City and 22 -24 mpg combined. The truck had 22.5k when I bought it. It now has 27k miles. on the clock. I recently had the truck serviced at the local Ford dealership. I took a trip from OKC to Lincoln Neb. and have been getting 15-16 mpg since the truck was serviced. The truck was in econ mode 2 hi the entire time. I took the truck back to the dealer to see what was going on. They ran diagnostics and said everything looked good. They couldn't give me an explanation to what might have cause the change in milage. I purchased this truck for the power and fuel mileage the Eco Boost delivers. Any body hear have any idea what goin on here. My 05 Chevy truck was almost as good as far as mpg that I am getting now
Tuned
Joined: Jan 2015
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From: Southeast Wisconsin
I bought a 2018 3.5 Eco Boost FX4 this past summer. It was getting 17mph City and 22 -24 mpg combined. The truck had 22.5k when I bought it. It now has 27k miles. on the clock. I recently had the truck serviced at the local Ford dealership. I took a trip from OKC to Lincoln Neb. and have been getting 15-16 mpg since the truck was serviced. The truck was in econ mode 2 hi the entire time. I took the truck back to the dealer to see what was going on. They ran diagnostics and said everything looked good. They couldn't give me an explanation to what might have cause the change in milage. I purchased this truck for the power and fuel mileage the Eco Boost delivers. Any body hear have any idea what goin on here. My 05 Chevy truck was almost as good as far as mpg that I am getting now
Fuel mileage is dependent on a number of variables. So what has changed since the fuel mileage suddenly dropped? Ambient temps (winter), tire pressure, driving speeds, loads? And are your mpg estimates lie-o-meter calculated or hand hand calculated, or both? Many variables to consider.
Fleet Mechanic
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My bet, winter blend gas, colder temps, lower psi in the tires, unfavorable winds. I get worse mileage in the winter, I think it's the gas personally.
Last edited by SpencerPJ; Jan 18, 2022 at 06:45 AM. Reason: spelling error
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Welcome to FTE, OKCgearhed
Did the computer get reflashed while it was in for service? If so you re going to have to go through the adaptive learning process again.
Did the computer get reflashed while it was in for service? If so you re going to have to go through the adaptive learning process again.
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I believe that is what OP is experiencing; MPG drop, due to the lower energy content of winter gasoline.
With summer fuel, I average 19-22MPG with my 2.7L; winter fuel has dropped the average to 17-18MPG
With summer fuel, I average 19-22MPG with my 2.7L; winter fuel has dropped the average to 17-18MPG
Lead Driver
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From: Mts. S. of San Francisco
Part of that is also the extended amount of time of just warming up to operating temp. IOW, it's not just the fuel, but the driving conditions.
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