Why has my gas mileage decreased since replacing the fuel filter?

UNLESS IT IS LEAKING FUEL OUT....I'D SAY NO!

I LOOKED UP THE FILTER IS THIS IT?

http://www.autozone.com/autozone/parts/Fram-Fuel-Filter/2002-Chevrolet-Cavalier/_/N-jh4qqZ8gd7g?itemIdentifier=618426_5306_0_

IF IT WERE TO GET RESTRICTED OR STOPPED UP---THE ENGINE WOULD STAMMER, STUMBLE, LACK POWER BIG-TIME OR NOT RUN AT ALL

IS YOUR CHECK ENGINE LIGHT ON CONSTANTLY? (IF SO, LET ME KNOW, WE WILL FOLLOW THAT LEAD)

DOES IT DISPLAY THAT THE BULB IS NOT BURNED OUT, AND "DOES" WORK, WHEN YOU GO TO CRANK UP THE ENGINE?

LAST TIME YOU DID A "REAL 100% TUNE-UP?"

HAVE YOU ALTERED OR MODIFIED THE CAR?

DO YOU HAVE A GUIDE TO HELP YOU KNOW WHAT/ WHEN/ HOW TO PERFORM THESE TASKS?

MANY ARE SIMPLE, AND EVEN A 3RD GRADER COULD DO THEM--AVOIDING A SHOP CHARGING YOU. IF YOU FEEL LIKE YOU CANNOT PERFORM THE MORE INVOLVED STUFF, LET THE SHOP DO THOSE. SEE THIS LINK

http://www.2carpros.com/questions/2007-ford-taurus-tune-up

I'M JUST TRYING TO AID YOU IN GETTING YOUR MPGs BACK

SEE IF ANY OF THESE VIDEOS MAY HELP

http://www.youtube.com/results?search_query=HOW+TO+GET+BETTER+GAS+MILAGE&oq=HOW+TO+GET+BETTER+GAS+MILAGE&aq=f&aqi=&aql=&gs_sm=s&gs_upl=2624195l2637965l0l2641355l53l35l0l18l18l5l230l1835l6.9.1l17l0

LET ME KNOW IF ANY OF THIS IS HELPING

THE MEDIC