1. Spark-plugs

Just like smooth flow of water is controlled through hose, not pipes, the spark plugs are the mediators of ignition power to car’s engine. The more efficient current they deliver, the less fuel will be consumed. Furthermore, a genuine spark plug also alleviates amount of toxic emissions in the exhaust system.

So, as a part of maintenance cycle of your car, always request the mechanic to replace the spark plug. If you are doing it yourself, you must know that spark-plugs are different for different vehicles, so make sure you find the right ones.