You can improve your gas mileage by 1-2 percents by using the manufacturer’s recommended grade of motor oil. For example, using 10W-30 motor oil in an engine designed to use 5W-20 can lower your gas mileage by 1-1.5 percent. THAT’S UP TO 4 A GALLON SAVED!


Fixing a car that is noticeably out of tune or has failed on emissions test can improve its gas mileage by an average of 4 percent. Fixing a serious MAINTENANCE problem, such as a faulty OXYGEN SENSOR, can improve your mileage by as much as 40 PERCENT!