A poorly maintained or malfunctioning car can release as much as 100 times the pollution of a well-maintained car. Almost half your tank of gas can be used simply by abusing or neglecting your vehicle. Having a trusted mechanic check your vehicle at regularly scheduled intervals will help your car to maintain its efficiency, and could save you up to $600 a year.
Changing your oil on a regular basis and using quality engine oil, preferably synthetic or standard oil treated with a friction reducing oil additive, can improve fuel economy by as much as 12%.
Consider using low-viscosity motor oil. This lubricates the moving parts of the engine better than ordinary oils, which reduces friction. The best oils can reduce carbon dioxide emissions by more than 2.5%.
Filters are part of the air intake system which adds oxygen to the engine for combustion. An air filter that is clogged with dirt, dust or bugs will hinder the oxygen flow resulting in more fuel being burned to compensate. Replacing a clogged air filter can reduce engine fuel consumption. If you drive a lot in stop and go traffic, or on dusty or dirt roads, your air filter may need to be changed more often.
Under-inflated tires result in less tire surface area in contact with the road as your tire is riding on the side walls more than optimizing the whole surface tread. Every two pounds per square inch (psi) your tire is under inflated, you are decreasing fuel efficiency by 1%.? To avoid this, check your tire pressure once a month in the summer and twice a month during colder periods. A tire can lose as much as 1 psi for every 5C change in temperature. The recommended psi for your tires is usually located on the drivers side door frame.