A modern model with spark plugs that are platinum-made should last at least 50,000 miles while iridium spark plugs are good for up to 100,000 miles and sometimes more. Consult your owner's manual to learn what kind of spark plugs your model has and the recommended lifespan of them. If you notice some problems before either benchmark then it's always better to replace them sooner rather than later to avoid getting stranded as well as potential damage to the vehicle.

How can car owners know it's time to replace their spark plugs? There are a few key giveaways car owners will notice when their spark plugs begin to go bad. If the vehicle struggles to start, the problem may be worn spark plugs. While driving, if you notice a rough idle, sluggish acceleration, or an increased fuel consumption, it may be time to replace worn out spark plugs. Regardless, you should check or have your spark plugs inspected regularly even if you haven't noticed any problems.

The last bit of info we'll leave drivers with is what causes spark plugs to go bad. Are there ways drivers can avoid wear-and-tear on their spark plugs? The most common problem with spark plugs is the build up oil and carbon that dulls their effectiveness. Now, some of this is unavoidable and the natural course of a vehicle's life, but things like the overheating of spark plugs from an incorrect fuel-to-air ratio can wear out spark plugs faster. Other factors for accelerated spark plug degradation include poor fuel quality and a bad fuel filter that can lead to a carbon build up. Another thing for drivers to look out for when their spark plugs are causing problems is a loose wire connection from low-quality plugs or improper engine tuning. Drivers should keep an eye on these things to help prolong the use and life of their spark plugs.