The simple answer is no. The
The simple answer is no. The complicated one is that EPA does not weigh City and Highway numbers and then divide evenly to calculate the combined number. Interestingly, the vast majority of cars we test at TN end up doing just a little better than the combined number after a week of testing. Almost every one does better on the highway, regardless of the fuel it uses. Despite the occasional exception, EPA's numbers are now conservative and a good predictor of real-world mileage results. Most people do a little better. One thing to keep in mind about the highway number is that it is not a steady-state test of highway mileage at the perfect sweet spot (55 MPG). If it was, and that is closer to what other countries use, the EPA number would be way higher. Cut and paste this link if you like to learn more: https://www.fueleconomy.gov/feg/fe_test_schedules.shtml