Can Replacing Spark Plugs Save Fuel?
2 Answers
Replacing spark plugs can indeed help save fuel, as failing to replace them after a certain usage period can lead to increased fuel consumption. Spark plug replacement cycle: Under normal maintenance conditions, spark plugs should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type. It is recommended to follow the user manual for guidance. The following standards can be referenced for maintenance replacement: Platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its appearance color to assess its condition. A normal spark plug's insulator skirt and electrodes should appear gray-white, gray-yellow, or light brown. A properly functioning spark plug's insulator skirt should be reddish-brown, with an electrode gap between 0.8-0.9mm and no signs of electrode burning. If the spark plug is covered in oil or deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates that the wrong heat range was selected or that the air-fuel mixture is too rich, with oil creeping up.
Replacing spark plugs with new ones can indeed help you save some fuel. The reason is simple: spark plugs are responsible for igniting the gasoline in the engine. Over time, old spark plugs can get dirty or worn out, causing the ignition timing to become inaccurate, which may lead to wasted fuel. With new spark plugs, ignition is timely and strong, resulting in more complete combustion and naturally lower fuel consumption. Having driven for over 20 years, I’ve noticed that every time I replace my spark plugs, the engine starts faster, runs smoother at high speeds, and fuel consumption drops by about 3%-5%. However, don’t expect too much—it’s just a small helper with limited fuel-saving effects. It should be combined with other good habits like maintaining proper tire pressure and avoiding sudden braking. Overall, replacing spark plugs on time is a smart choice that keeps your car running more efficiently.
