I am new here and have just been reading the forums getting some idea, but was wondering if anyone could help me out. I live in Chicago and commute 20 miles to work. 2 miles on a normal rode 18 on the highway. This 20 mile drive normally takes an hour, and other than tire pressure and not using my air I didn't see anything that could really help me to get better fuel mileage. I drive an 06 Mercury Milan(Ford Fusion) with a 6 cylinder engine. Any tips would be appreciated!!