Keep Your Car in Prime Condition: Air Filter

Be sure to keep your air filters clean.

Additional Information: 
  • Tests suggest that replacing a clogged air filter on an older car with a carbureted engine may improve fuel economy 2-6% under normal replacement conditions, or up to 14% if the filter is so clogged that it significantly affects drivability.
  • http://www.fueleconomy.gov/feg/maintain.shtml