Engine tune up is a very necessary part of a carâs maintenance. An overall check up of your vehicle is very much necessary, if you want to increase the longevity of your vehicle. A tune up will revive your car and you will feel smoother to drive it afterwards. A tune up involves checking and changing the spark plugs. The gasoline will ignite more easily, if it gets a stronger spark from the spark plug and which means it burns efficiently. As a result, less gas is needed to generate energy and your car will use less gas costing you less money.