1: When driving on the freeway, always use cruise control, set at 60 MPH. Fuel economy drops in an exponential fashion, not linear, at speeds over 60 MPH. I drive a 1998 Dodge Ram with a 5.9 liter V8, and when I cruise at 60, I get 20 MPG. 20! If you drive 20 miles at 60 MPH, you get there in 20 minutes. If you drive 20 miles at 70 MPH, you'll save a bit less than 3 minutes, but your fuel economy will suffer significantly. Cruise control will also improve your economy at any other speed you are driving, if you are able to use it.
2: Don't try to be the first guy at the next red light. I can't tell you how many times I have had people go out of their way to pass me because I was driving at the speed limit, only to have me coast up next to them at the next red light.
3: The moment you see a light turn red some blocks in front of you, take your foot off the gas, put the car in neutral, and coast until it turns green. A good part of the time, it will turn green before you get there.
4: Don't bother driving over the speed limit in city or stop and go traffic. You won't get to your destination any faster, and you'll burn more gas in the process.
5: Most people don't ever check the inflation in their tires. Improperly inflated tires can cut your fuel economy by as much as ten percent. Check them when you fill up your gas tank.
6: When you buy gasoline, always fill your tank. You're going to burn it, and gasoline in a full tank evaporates at a slower rate than in a gas tank that is half filled with air.
7: If you maintain your vehicle properly, (spark plugs, wires, and fuel and air filters especially), you should really only need injector cleaner maybe twice a year, depending on what you are driving and how and where you drive. Fuel filters are one of the most neglected parts on most cars, right behind transmission fluid and differential oil. Properly firing spark plugs igniting a mixture of gasoline and clean air just don't leave that much behind.
