My wife drives a '06 SR5 V8 4WD we bought new and now has almost 180,000 mi. The computer says 17.5 MPG, but hand calculated it's 15-16 around town. We get 19-20 hand calculated on the highway on our annual trip to Florida. The 4.7 is a great engine, my '04 Tundra had 345,000 on it when I sold...