My MPG decrease 2mpg when I went from stock street tires to a tall, wider,
deeper treaded tire. Fully loaded I now get around 7mpg (2003 GMC 3/4 ton
4x4). I tried adding a fancy air filter that supposedly would
get me an extra 2mpg -- not. I have decided to sell this truck and
get a diesel as soon as I can afford to.
