Tied with the 4.0L Tundra is the Ford F-150 decked out with the EcoBoost engine. The F-150 eeks out 18 mpg, which may not seem like a lot. However, when you take a look at the power numbers you’ll see why the EcoBoost is so significant. Netting 365hp and 420lb-ft or torque is really something when you can get such modest fuel-economy numbers at 16 mpg city and 22 mpg highway