·Avoid aggresive driving. Not only can it be dangerous, but constant speed changes and quick, uneven stops and starts waste a lot of fuel. Taking it easier behind the wheel can improve your gas mileage by as much as 33%!
·Slow down. Another form of aggressive driving – speeding – can be a big fuel waster. Gas mileage usually decreases rapidly at speeds above 60 mph. Reducing your speed from 65 to 55 mph can improve your fuel economy by 10% to 15% and reducing your speed from 70 to 55 mph can improve your fuel economy by a whopping 25%. So what’s your hurry?
·Remove excess weight. You can save about 2% in fuel efficiency for every 100 lbs. of extra clutter you can remove from your car or truck.
·Use your cruise control. This helps you save fuel in two ways. First, it controls your maximum speed, which can help you stay below 60 mph. Second, it maintains a constant speed, which means you won’t be pumping extra fuel into your engine to accelerate.
·Reduce your drag. 50% of the energy required to operate most vehicles is spent overcoming wind resistance. Cartop carriers, rooftop bike racks and even those plastic window flags for your favorite sports team can all add resistance and cut down your fuel efficiency, especially at high speeds. Washing and waxing your vehicle can actually help your aerodynamics too.
·Save A/C for the highway. Your air conditioning makes your engine work harder, which can equate to as much as a 10% to 15% reduction in fuel efficiency when outdoor temperatures climb above 80° Fahrenheit. For city driving or in heavy traffic, turn your air conditioning off and roll down the windows if you can stand the heat. At speeds of 50 mph or more, however, the drag created by your open windows will actually cost you more in fuel economy than the A/C. So feel free to roll your windows up and use the air on the highway if you need to.
·Avoid idling. It's more fuel efficient to turn off your engine when you're waiting in the car.
·Combine trips. Your engine works most efficiently when warmed up!