Green Maintenance Tips

You can save money and energy-and wear and tear on your vehicle-with proper care and maintenance. Here are the items that most affect fuel economy.

• MOTOR OIL. Top off and change oil as necessary with manufacturer-recommended grade, “energy conserving” motor oils. Doing so can improve fuel economy by up to 2 percent, according to the U.S. Environmental Protection Agency (EPA). Replacing conventional oils with synthetics may offer even greater fuel economy benefits.
• AIR FILTERS. Make sure you change your air filter at the end of its recommended lifespan. Replacing a clogged air filter can improve a vehicle’s gas mileage by up to 10 percent, according to the U.S. Department of Energy.
• ENGINE PERFORMANCE. Enhance fuel economy performance by having engines tuned a spark plugs replaced according to the manufacturer’s recommended schedule. A single misfiring spark plug can cut fuel economy by up to 4 percent, according to the EPA.
• BRAKES. Improperly maintained brakes can result in unwanted drag. This unnecessary resistance can have the same effect as driving with a foot on the brake pedal: a dramatic drop in fuel economy.
• WARNING LIGHTS for “Service Engine Soon” or “Check Engine.” Ignoring these indicators may result in poor fuel economy performance and require expensive repairs. For example, a warning light may indicate a faulty oxygen sensor is sending more fuel to the engine than necessary, which can result in a 40-percent fuel economy decline. A warning light could also indicate a faulty thermostat, which can prevent a cold engine from reaching its normal operating temperature resulting in the unnecessary injection of fuel.
• TIRE WEAR. Replacing worn tires with a manufacturer-recommended size and style can save hundreds of dollars a year. To improve fuel economy performance, consider low rolling-resistance replacement tires.
• TIRE INFLATION PRESSURE. Keeping tires inflated to at least the manufacturer-recommended pressure can improve fuel economy by up to 3 percent, according to the EPA. Under-inflated tires require more energy to roll, meaning more fill-ups.
• UNNECESSARY ITEMS THAT ADD WEIGHT TO THE VEHICLE. Unnecessary weight lowers fuel economy; remove heavy items from your trunk and back seat.
• EVAPORATIVE EMISSION CONTROLS. Poorly operating evaporative emission controls can fail to capture gasoline vapors and recycle them to the fuel tank. Faulty controls waste gas and degrade air quality.
• TRANSMISSION. Properly operating modern transmissions and drive components are critical to vehicle fuel economy performance. Routinely check proper levels and system operation.