http://www.ehow.com/guide_7-http://www.ehow.com/guide_7-cars.html.htmlwww.ehow.comhttp://www.ehow.com/how_2328477_tire-care-miles-per-gallon.htmlTake care of your tires and check your tire pressure to prevent rolling resistance, which hurts fuel efficiency, lowering your miles per gallon, or MPGs; learn how from our green car expert in this free environmental automotive video. Published on 6/16/2008