By following a few simple preventive maintenance steps, you can help protect the environment: 1.Keep your car properly tuned for optimum performance– A properly maintained vehicle improves its efficiency, reduces emissions and saves you money. 2.Drive Smart –Aggressive driving (speeding, rapid acceleration and braking) can also reduce gas mileage – as much as 33 percent on the highway and five percent on city roads. 3.Use your air conditioning only when needed. Parking in the shade and using a reflective windshield shade can help your car stay cooler when parked. 4.Lighten the Load – Get the junk out of the trunk and the stuff out of your car. Extra items weigh the vehicle down and cause an increase in gas usage. 5.Regularly check and replace dirty air filters– The air filter should be inspected at each oil change, and replaced annually or when restricted, torn, water or oil-soaked. 6.Maintain the cooling system– A cooling system thermostat that causes the engine to run too cold will lower the fuel efficiency of a car by as much as one or two mpg. 7.Tire Checks – Proper tire pressure can improve gas mileage by 3.3 percent or 10 cents per litre. Tire pressure should be checked at least monthly, including the spare.