Have you been to the doctor's recently?

Do you remember the Good Old Days - before you were prescribed something to reduce your blood pressure, something else to reduce your cholesterol, something else for your arthritis etc etc?

Those were the days when the Doctor asked you to cough whilst holding a certain tender part of your anatomy (this only applied to half the population) and asked you to stick your tongue out; Doctors can tell a lot from your tongue**

- you may have a ‘bald’ tongue, patchy tongue, furred tongue, white patches, ulcers etc.

Well, the spark plugs in your car are a bit like that in that they can help to indicate some of the things which may be wrong with your engine; this guide is taken from NGK’s website.

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Spark plugs can tell your engine's health
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