Getting the most from a tank of gas

STABILIZED SINCE THE COLONIALPIPELINE SHUT DOWN -- THEY'RESTILL GOING TO B HEIGHER ASMORE PEOPLE START TRAVELINGAGAIN THIS SUMMER.

NEWS 3ANCHOR ERICA GREENWAY HAS ALOOK AT SOME OF THE CHANGESCONSUMER REPORTS RECOMMENDS TOSAVE SOME MONEY.JEFF BARTLETT: IF YOU PUT THEWINDOWS DOWN IT ACTUALLYDOESN'T HAVE A MEASURABLEIMPACT ON FUEL ECONOMY,WHEREAS USING AC CAN IMPACT ITFROM 1 - 4 MILES PER GALLONBUT IF IT'S REALLY WARMCERTAINLY USE THE AC.

ERICAGREENWAY: WHAT ABOUT WHEN ITCOMES TO WHAT TYPE OF FUEL WEUSE?

JEFF BARTLETT: WELL, THEKEY IN CHOOSING YOUR GASOLINEIS TO FOLLOW THE INSTRUCTIONSTHAT COME WITH THE CAR.

SIMPLYOPEN THE FUEL FILLER DOOR, ANDIT WILL SAY WHAT IS REQUIREDTHERE.

IF IT SAYS PREMIUMSREQUIRED, I'M AFRAID YOU'REGONNA BE PAYING A LITTLE BITEXTRA AND YOU SHOULD STICKWITH THAT.

IF IT SAYSPREMIUM'S RECOMMENDED THATMEANS IT'S OPTIONAL, YOU HAVETHE CHOICE OF USING REGULARMID GRADE OR PREMIUMER.

ICAGREENWAY: HOW MUCH OF ANIMPACT DO THINGS LIKE ROOFRACKS KEMA?

JEFF BARTLETT:WELL, THE KEY FACTOR IN FUELECONOMY IS AERODYNAMICS ANDCERTAINLY IF YOU PUT SOMETHINGON THE ROOF OR BIKE RACK ONTHE BACK IT'S GOING TO DISRUPTTHE AERODYNAMICS THERE'S APRETTY LARGE FUEL ECONOMYNPEALTY TO BE PAID.

SOMECONSUMER REPORTS TESTS HAVEFOUND THAT THE IMPACT CANRANGE FROM FIVE MILES PERGALLON TO AS MUCH AS 13 MILESPER GALLON DEPENDING ON THEVEHICLE AND THE TYPE OF RACK.NOW, CERTAINLY, WE ENCOURAGEPEOPLE TO GET OUT AND HAVE AGOOD TIME BUT WE'D RECOMMENDWHEN YOU'RE AT YOUR LOCATIONOR AT HOME DURING THE WEEK, IFYOU DON'T NEE DTHE RACK TAKEIT OFF."AND IF YOU TEND TO SPEED -THIS MAY SLOW YOU DOWN.

THEDIFFERENCE IN GOING 75 INSTEADOF 5 5IS IKLE GOING FROM ACOMPACT CAR TO A LARGE SUV.