� Keep the tires of your vehicle properly inflated. The U.S. Department of Energy reports that underinflated tires increase fuel consumption by up to 6 percent and one study estimates that 50 to 80 percent of all tires on the road are underinflated. By these estimates, the U.S. could save up to 2 billion gallons of gas each year simply by properly inflating tires.
� Regularly replace your air filter. A clogged air filter can increase fuel consumption by as much as 10 percent. An added bonus: Air filters keep impurities from damaging the interior of the engine. Replacing them won't just save you gas. It could save your engine, too.
� Upgrade your motor oil. According to multiple independent university tests, Royal Purple motor oil improves fuel economy by as much as 5 percent and produces notable horsepower and torque improvements. That means motorists could save gas without giving up performance.
� Follow the maintenance recommendations in your vehicle's owner's manual. An out-of-tune engine can increase fuel consumption by as much as 15 percent. Always follow your car manufacturer's suggested tune-up schedule.
� Lighten your load. Don't carry extra weight in your vehicle. Doing so burns extra gas and could cost you money. Only carry sandbags, tools and other heavy items when you think you'll be needing them. Also, don't forget that carrying lots of small, light items can be the same as carrying one heavy item. Be sure to clean your trunk and backseat out regularly.
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