JIMMY

HI EVERYONE, I HAVE A HIGHLANDER 2001 4WD AND MY GAS MILEAGE IS VERY BAD I JUST GOT NEW TIRES AND GET THE OIL CHANGED EVERY 3-4 MONTHS SO ITS UP TO DATE CAN ANYONE SUGGEST A WAY TO GET BETTER MILEAGE I'M GETTING ABOUT 10 MILES TO THE GALLON I DRIVE ON HIGHWAY AND CITY MOSTLY CITY. THANKS TO MUCH GAS IN CHICAGO