http://www.funadvice.com/my/advice/mjmj en-us Overinflation of the tires Tune-ups - and don't skip the air filter, breather filter (if you have one) and the PCV valve Windows up, a/c off Backroads instead of highway Shift into neutral and foot off gas on downhills Heavier engine oil if car is older Using gps or mapquest to find shortest, not fastest, routes Also, if you are in a pickup, the tailgate should be DOWN or completely off, NOT UP! The gate resists air flow! Better still is covering the bed entirely, so it's smooth and uniform. mjmj Wed, 24 Oct 2007 08:41:01 -0700 http://www.funadvice.com/q/ways_to_get_better_gas_mileage 118194