- Keep your windows closed at high speeds—drag from open windows can reduce a car’s fuel efficiency by 10 percent.
- Cleaning 100 pounds of junk from your car will get you up to 2 percent more miles per gallon.
- Tighten your gas cap—a leaking or missing cap can release 30 gallons of fuel per year into the atmosphere.
(Blatantly reproduced from Discover Magazine.)