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2019 Ford F-150 Diesel Gets 30 MPG Highway, But There's A Catch

Diesel / 8 Comments

If you want the F-150 Power Stroke's full 30 mpg, you'll need to make do with two-wheel drive.

It's been over a decade in the making. Ford has given its best-selling F-150 a compression-ignition heart for the first time in history. Yet when the Blue Oval first revealed the F-150 Power Stroke in January, powered by a new 3.0-liter turbodiesel V6, it left out one very important measure: fuel economy. Now, after over three months of waiting, Ford has finally announced the Power Stroke will achieve an estimated 30 mpg highway... but there's a catch, and it will cost you a massive 5 mpg.

The 2018 Ford F-150 Power Stroke has been given an EPA-estimated fuel economy rating of 30 mpg highway, 22 mpg city, and 25 mpg combined. Ford boasts the 30 mpg highway figure is best-in-class, outperforming the 2018 Ram 1500 EcoDiesel's 27 mpg highway figure. However, David Tracy at Jalopnik did a bit of digging and found the F-150 Power Stroke will only achieve that figure in two-wheel drive spec. Checking off 4x4 on the option sheet drags down the highway mileage figure a massive 5 mpg. "A Ford representative told me ... the four-wheel drive version of this same truck scores an EPA rating of 25 MPG highway, 22 MPG combined and 20 MPG city," wrote Tracy.

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The discrepancy, he found, had to do with a combination of factors. The 4x4 system adds extra driveline drag and increased overall vehicle weight. The two-wheel-drive model is also fitted with a taller 3.31 final drive ratio and all-season tires on 20-inch wheels, while 4x4 models run a shorter 3.55 final drive, sit on all-terrain tires with grippier treads and receive a "Torque on Demand" transfer case. These differences, along with possible aerodynamic changes, conspire to drag down highway fuel economy figures by 5 mpg in 4x4 models. The F-150 Power Stroke's 3.0-liter turbodiesel V6 is mated to a 10-speed automatic transmission and will begin arriving at dealers this May.