Budget travel tip #6: Improve fuel economy

During this summer driving season, regular gasoline retail prices are projected to average $2.21 per gallon, down about $1.60 from last summer, according to the U.S. Energy Information Administration. This makes gas seem like a good deal. But regardless of the prices at the pump, any time you're on a road-trip the cost of gas adds up. Here are some tips from AAA on ways to save by improving your car's fuel economy.

• Inflate tires according to the recommendation in the owner's manual or as shown on a label attached to the driver's door pillar. Underinflated tires are a safety hazard and can cut fuel economy by as much as 2 percent per pound of pressure below the recommended level.
• Spark plugs must be in good condition. Some will last for 100,000 miles, but many need to be replaced more often.Take care of car-care "incidentals" that can affect fuel use. For example, a defective radiator thermostat can waste gas by extending the engine's warm-up time or decreasing the engine's operating temperature. A stuck brake caliper can create drag, which also wastes fuel.
• Check the air filter twice a year, or more often in dusty conditions. A dirty air filter increases fuel consumption and can cause poor performance.
• Cruise control may be a fuel-saving option if you drive a lot on open roads. Maintaining a steady speed conserves fuel.
• Maintain steady speeds for the best fuel economy. A car uses extra fuel when it accelerates.
• Travel at moderate speeds on the open road. Higher speeds require more gasoline use to overcome air resistance. Remember, however, speeds slower than the flow of traffic can create a traffic hazard.
• Use the air conditioner only when needed. Air conditioning dramatically reduces fuel economy. Most air conditioners have an "economy" setting that allows the circulation of unchilled air. Many also have a "maximum" or "recirculation" setting that reduces the amount of hot outside air that must be chilled. Both settings can reduce the air conditioning load—and save gas.