Reminder: Change your air filter!
Your car’s air filter can quickly fill with dirt, dust and bugs. When this happens, your engine has to work harder, and your car isn’t able to use fuel as efficiently.
Some estimates suggest you can improve your gas mileage by as much as 10 percent when you replace your air filter, so what are you waiting for?
Then, try to get on a regular schedule. Check your owner’s manual for specific guidelines about how often you should change your air filter, or simply have yours checked every time you go in for an oil change.