Over the years since the first one rolled off the line for the 1964.5 model year, the number of cylinders a Mustang packs has ranged from the traditional eight to six to even a wimpy four. In recent years, most rental Mustangs had the V-6. But for the sixth-gen facelift, Ford dropped the V-6 for a turbo four-cylinder as the entry-level engine. Don’t look so disappointed: It’s the rowdy 2.3-liter turbo four-banger from the Focus RS with more horsepower and torque than the last-generation Mustang’s 4.6-liter V-8! Our test car had the high performance package to boot, which increases horsepower by 20 extra ponies, provides wider Pirelli horseshoes, and includes a louder exhaust. So what does all this do for the Mustang EcoBoost mpg numbers?
Since we had it in our stables, we took it out to see what kind of fuel economy this “economical variant” returned on the highway. After our 100-mile test, we found the turbo Mustang to beat the EPA’s 28-mpg claim for the high-output-tuned engine by 1 mile per gallon. For a car that has such sticky rubber, 330 horsepower, and a 10-speed automatic transmission, 29 mpg is pretty darn good.
If, like in the olden days, you wanted to take a cross-country trip with your trusty steed, you could expect to travel about 440 miles between needing to stop and feed it a nice ethanol blend of corn, barley, and petroleum. (For those who aren’t aware, most gas stations have up to 10% ethanol in their pump product.) Jokes aside, the Mustang doesn’t have a very large stomach if you’re a spirited driver.
How We Test
Daily Motor’s real-world 2020 Ford Mustang EcoBoost High Performance Package with 10-speed auto (GASP) fuel economy test consists of over 100 miles of consistent highway driving. We fill the vehicle using the “three-click method,” meaning running the gas pump on high flow until it clicks, waiting ten seconds, running low flow until it clicks again, waiting another ten seconds, then running low flow one last time. The lowest octane fuel accepted by the vehicle’s manufacturer is used. We then drive 50 miles on public highway in one direction and then turn back in the opposite direction, attempting not to draft or drive aggressively. We set the cruise control at GPS-indicated 72 mph in an attempt to achieve a moving average speed of 70 mph over the entire test. Upon return to the gas station, we refill at the exact same gas pump as the initial fill using the same method. Mpg is determined by dividing total miles traveled by fuel consumed. In cases where our observed figure differs greatly from the vehicle’s indicated figure and/or EPA’s estimate, we may recommend a number in between or plan to retest the vehicle.
To see the full Mustang EcoBoost mpg test, click here: