I've had my 06 Tundra for 5 weeks now, 500 miles. I drive 2.8 miles round trip to work and back. I coast to work, because it is all downhill. I climb a steep mountain going home. Only getting 10 mpg. Going to put Nitrogen in tires and replace air filter with a K & N air filter, hope mileage improve. This is the only complaint I have on this vehicle, otherwise it is great.