How Often Should the Spark Plugs Be Replaced on the Envision?
2 Answers
Envision spark plug replacement interval: Under normal maintenance conditions, replacement is recommended after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is advisable to follow the owner's manual. You can refer to the following standards 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. How spark plugs work: The spark plug's ground electrode is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the center electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. When current passes through the terminal nut and the center electrode, it ionizes the medium between the center electrode and the ground electrode, producing a spark that ignites the air-fuel mixture in the cylinder.
I've been driving a Buick Envision for over 5 years and have some insights on spark plug replacement intervals. The manual typically recommends changing them every 60,000 to 100,000 kilometers, but this depends on the model year and spark plug material—iridium or platinum plugs can last longer, around 80,000 kilometers. Since I frequently drive on highways where the engine load is lighter, I replace them every 70,000 kilometers. However, if you often drive in city traffic with frequent stops, wear is faster, and you should check them at around 50,000 kilometers. Neglecting this can lead to unstable ignition with old spark plugs, potentially increasing fuel consumption by up to 10%, or even causing engine misfires and sluggish acceleration. I always make sure to have the spark plug gap checked during regular maintenance, along with inspecting the ignition coils, to ensure safety, save money, and keep the car running smoothly and reliably.
