Speed matters as the aerodynamics (Drag CD) are not very good. On Interstate I get about 22 -23 depending on my speed. On 2 lanes at speeds of 55-60 I get around 25ish. It's a fairly heavy vehicle so that is a factor too. I believe EPA estimates are at a lower speed than most people drive. MPG's have increased some as I get more mileage on the engine (currently about 6,200 miles). I also calculate mileage as the computer is usually 1.5 - 2.5 mpg optimistic.