How Often Do I Need To Change My Spark Plugs?

Most people don't think twice about their spark plugs, but these little parts play an extremely important role in the way your car runs. In fact, without properly working spark plugs, your car may well not run at all. In this blog, our car repair experts will take a closer look at why your spark plugs are so important.

4 Spark Plug FAQs

The following are some of the most frequently asked questions about spark plugs and their answers.

1. How often do I need to change my spark plugs?

The spark plug replacement interval depends on your driving habits and the type of spark plugs you use. You will usually encounter two types of spark plugs - conventional spark plugs and long life spark plug units.

Conventional spark plugs usually last between 30,000-50,000 miles, although some conventional spark plugs can last up to 60,000 miles.

Spark Plug

Long life spark plugs, on the other hand, can give you 100,000 miles or more! Iridium plugs can last even longer.

You can also refer to the manufacturer's manual to determine the recommended replacement interval for worn spark plugs. If you are upgrading to new spark plugs, consult your mechanic before making any changes.

2. Can I change the spark plugs in advance just in case?

Changing spark plugs is usually a precautionary measure, which means you don't have to wait until they cause engine misfires or other problems before replacing them.

If your mechanic recommends 60,000 miles, you can replace conventional spark plugs at 50,000 miles. Most people don't wait until 120,000 miles to replace their long-life spark plug set.

The key here is to check the spark plugs regularly. As spark plugs wear out over time, some cars may need to change lanes before the specified time interval.

In most cases, you need to look out for signs that indicate damaged spark plugs or a sluggish engine response. These include poor acceleration, erratic idling, engine noise due to misfires, etc. Monitor how often you experience these signs and schedule a spark plug check.

Spark Plug

3. Do spark plugs need to be replaced at once?

Most mechanics recommend replacing spark plugs as a set.

The reasons for this are as follows.

Your spark plugs need to have a similar level of performance for optimum combustion.

If one of your plugs is performing well and the others are old and rusty, it will cause the engine to get out of sync.

Replacing individual plugs can disrupt their rotation interval. If each spark plug is at a different replacement interval, you must check the spark plugs twice over.

Your spark plugs should always have the same resistance. If one of them performs slightly better than the others, the engine will be out of balance. It will put more strain on an otherwise stable combustion system and lead to excessive wear.

Replacing all worn spark plugs is standard maintenance practice and is best adhered to. You will save more time and effort in the long run!

4. What is a convenient solution for replacing spark plugs?

Replacing spark plugs can be daunting if you haven't done it before. You need to make sure they are gapped correctly and fitted with the correct torque.

Someone with good mechanical knowledge should be able to replace worn spark plugs. If this isn't you, you can always ask for help!

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