Mountain Top Tundra 
2006 Toyota Tundra Access Cab SR5 4dr Access Cab 4WD SB (4.7L 8cyl 5A)
Poor gas mileage climbing hills
 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.