Where do you purchase spark plugs?

Automotive supply shops such as AutoZone and O'Reilly Auto Parts carry spark plugs. Over time, as spark plugs develop wear and tear, it's necessary to change them to maintain optimal performance of the engine.

There are six warning signs that it is time for a new spark plug. If the engine sounds rough when the car is idling and the car is vibrating, a mechanic needs to look at the engine. If the car doesn't start easily and the battery isn't the culprit, worn spark plugs can be the cause. Engine misfire, elevated fuel consumption, hampered acceleration and engine surges are also warning signs that a new spark plug is necessary.