Just filled up yesterday and checked the mileage, 280 miles on 10.02 gallons so that's exactly 28 mpg. This tankful was strictly driving back and forth to work, about 1/3 highway, 2/3 country roads at 35-50 mph, and one 100 mile round-trip to a remote office that was 80% highway driving at 70 mph average...
And remember, I weight about 310 pounds...