2000 Ford Taurus se

Hello, there are many possible causes to reduce fuel economy. To be honest, the best move is to have testing performed by a technician at a shop near you to find out if there are any engine performance failures. Do you have any warning lights illuminated on your dash? Sometimes warning lights appear to show you there's a problem and some problems can affect fuel economy. Things as simple as replacing your engine air filter, replacing your spark plugs and making sure nothing is causing excessive wind resistance while you drive are good first steps. Sensors for the engine that help control fuel delivery are important to check, but when they fail, usually a warning, light illuminates. Seek guidance at a shop near you!