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Find Your Plugs
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IRIDIUM POWER
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Specifications
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IRIDIUM POWER
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Plugs Configrations
 Plugs Specifications
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IRIDIUM TOUGH Q&A
TECH Q&A
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Basic Knowledge
Inspecting and Exchanging Plugs / Service Life
Problems like these can occur!
· Starting is not so good.
· Fewer horsepower.
· Idling becomes rough.
· Mileage becomes worse.
Time for Preventative Replacement New Plug
When to Replace Spark Plugs
If the center electrode tip becomes worn out into a round shape, it is possible that the sparks produced are not as effective, resulting in the fuel-air mixture being ignited less steadily. If this happens, engine horsepower decreases fuel consumption becomes worse, and engine lifetime may be negatively affected; we recommend regular replacement of spark plugs.
Cars: 15,000 to 20,000km
Small Car(6600cc)s: 7,000 to 10,000km
Motorcycles: 3,000 to 5,000km
* Service lifetime is an approximate guideline. Depending on the ignition system of the vehicle, the service lifetime may become shorter.
Results of Spark Plug Replacement
· Improved Mileage
· Better Starting
· Better Acceleration
For a pleasant driving,
We recommend the regular inspection and replacement of spark plugs!


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