When and Why Should I Change My Spark Plugs?

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When and Why Should I Change My Spark Plugs?

Posted on 28 Feb 2017

You buy a brand-new Ford here at Jennings. You then promptly forget about the service schedule until you receive your first reminder that service is due. Still, you trust us to do what needs to be done – just as you should. But then a few years down the road, you start wondering about your spark plugs. As far as you know, they have never been changed.

It's not uncommon for customers to ask us when and why they should consider changing their spark plugs. So we thought it would benefit our readers to answer those questions here. Let's begin with when you should change the plugs.

When And Why Should I Change My Spark Plugs

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Check the Manufacturer's Guidelines

The number one rule for all regular service is to check the manufacturer's guidelines first. Ford is like any other manufacturer in that they establish a schedule for all routine service. We can't give you answer here because recommendations are different from one model to the next.

On the low end, some cars need new spark plugs anywhere between 12K and 50K miles. Newer cars tend to have long-life spark plugs that can allegedly go up to 100K miles while maintaining the correct gap.

So, start by checking the manufacturer's guidelines. Then ask your mechanic to just take a quick look at your plugs whenever your car is serviced. Just because your owner's manual says your plugs are good for 100K miles doesn't make it so. Consider this: a 100K spark plug is on the last 25% of its life once the car reaches 75K miles. You might not want to wait that long.

Top Reasons for Changing Your Plugs

Now let's move on to the question of why spark plugs need to be changed. Spark plugs create the spark that ignites fuel in your car's combustion chamber, thereby keeping the engine running and your car moving forward. Worn spark plugs present a number of problems:

  • Poor Fuel Mileage – When spark plugs begin to wear out, they do not work as efficiently. As a result, your engine doesn't work as efficiently either. This results in less than optimal fuel mileage. The money you save by not changing your plugs on time could be blown right out the exhaust because you're burning more fuel.
  • Poor Engine Performance – Worn spark plugs don't always fire exactly on time or with enough of a spark. This can cause degraded engine performance. Worn spark plugs could mean your car cannot accelerate as fast and demonstrates insufficient power to keep up with traffic on motorways.
  • Starting Is More Difficult – Worn spark plugs make starting the engine more difficult. This causes unnecessary wear that could reduce the life of your car's motor.

Get to know the manufacturer's guidelines for your car's spark plugs. Then have your mechanic check your plugs whenever your car is serviced. Keeping plugs in top shape will maximise your fuel mileage and extend the life of your car. For further information about the Ford car range speak to a member of the http://www.jenningsforddirect.co.uk team today.



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