Your dedication to making things work should extend to your vehicle. A well-tuned car with properly-inflated tires burns less gasoline which in turn saves money and cuts down on pollution. The average life of your tire can also be extended by 15 percent. Take your car in for regular check-ups. Resist driving at high speeds to make the most of your gas mileage. Slowing from 70 to 60 mph improves average fuel efficiency by 17. 2 percent!