1.    Drive Sensibly | Estimated Savings up to 22%
Speeding, Rapid acceleration and constant breaking are all symptoms of aggressive driving that waste gas. Try to maintain a more constant speed. You can lower gas mileage by as much as 22% on the highway and 5% on city streets by driving sensibly

2.    Use the Correct Oil | Estimated Savings up to 2%
You can improve your gas mileage by up to 2% when using the grade of oil recommended by the manufacturer 

3.    Check Your Gas Cap | Estimated Savings of gallons of gas per year
Gas caps that are loose or missing can cause gallons of gas to vaporize, thus sending you to the pump sooner than necessary

4.    Drop the Weight | Estimated Savings of at least 2%
Avoid keeping unnecessary, heavy items in your vehicle. an extra 100 pounds could reduce your mpg by up to 2% based on the percentage of extra weight relative to the vehicle's total weight, which affects smaller cars more than larger ones

5.    Get A Plan | Estimated Saving of gallons of gas per year
Trips to the grocery store, dry cleaners, and shopping should be planned so you are not wasting time retracing your route. In stop and go traffic fuel consumption can increase by as much as 20%

6.    Keep Tires Properly Inflated | Estimated Savings up to 3%
When Tires are not inflated properly, you will add drag to the car, and that causes an increase in gas consumption.