Maintaining your car's engine can go a long way in fuel savings. If your car needs service, a simple tuneup can improve gas mileage by around 4 percent. Make sure you're also changing your oil on schedule and using the right grade of motor oil for your car. That little bit of maintenance can buy you another 1 to 2 percent increase in fuel economy. You can check the owner's manual to see what grade of motor oil the car manufacturer recommends.
While a tuneup can make a big difference in gas mileage, maintenance won't always impact fuel economy. One common myth is that changing the air filter will improve your miles per gallon, but for most cars produced since the 1980s, this isn't true. If you have an older car, though, make sure you're changing that filter once a year or every 12,000 miles (19,312 kilometers) for a fuel savings boost of 2 to 6 percent.
Your engine isn't the only thing that needs maintenance if you want to maximize your miles per gallon. See how tending to your tires can boost fuel economy on the next page.