fuel concerns

Check out this government web site http://www.fueleconomy.gov/feg/bymake/bymanuNF.shtml Your vehicle has On Board Diagnostics level 2 (OBD2) a diagnostic socket under the dash allows a garage to scan for trouble codes. Part of the important diagnostic capabilities of the scan tool is it stores a lot of relevant information that may indicate why your vehicle is heavy on gas. Key information on long and short term fuel trim figures would indicate a problem.

Just in case your vehicles check engine light is not on ask the repair facility to do a manual/ visual inspection of your combustion components because deterioration of these items can cause lowered fuel milage.