If you want to get better gas mileage on your Honda Civic, one of the best things you can do is install a cold air intake. A cold air intake will improve your car's fuel efficiency by allowing it to burn cooler, denser air. This means that your engine will be able to extract more power from each drop of gasoline, resulting in improved performance and economy.
Installing a cold air intake on your Civic is a fairly simple process that most people can do in about an hour. You'll just need a few basic tools and some patience. Once you've got your new cold air intake installed, you'll be able to enjoy increased power and better gas mileage - it's a win-win!