Petrol engines use spark plugs for igniting the air-and-fuel mixture inside the cylinders. They differ in the number of electrodes, production material and are produced by a wide range of companies. In this article, you will find information on how to choose the components properly to make the engine start easier, increase its output, reduce fuel consumption, and many other useful tips.
Main types
By the number of electrodes:- Single-electrode. They have one centre and one side electrode made of metal with a diameter of 2.5 mm. This simple design ensures efficient combustion. Such parts are low-priced and have a short working lifespan.
- Multi-electrode. They have up to 4 side electrodes. They feature high longevity because their working elements wear out one by one. However, it is impossible to adjust the gap between the electrodes. These components are the best choice for engines in which the spark plugs wells are hard to reach.
- Copper-nickel. They have a working lifespan of 25,000-30,000 kilometres. They are affordably priced and optimal for in-line engines.
- Platinum. They serve for up to 120,000 kilometres. They feature a thin electrode, which emits a more powerful spark.
- Iridium. These plugs are more resistant to high temperatures and corrosion. They have the same lifespan as the platinum ones and provide maximally efficient fuel combustion.
- Silver. They are resistant to high loads, vibrations, as well as to fouling. They are the best choice for cars working on liquefied petroleum gas. Their disadvantage is a short working lifespan: on average, up to 30,000 kilometres.
- Hot. They have low heat dispersal from the central electrode and insulator. They are used in power units with a low compression ratio, operating on low-octane fuel.
- Cold. They feature high heat dispersal and are used in motors that require high-octane fuel and have a high compression ratio.
- Medium. They have balanced characteristics of the first two types. These spark plugs are the most common.
Popular models of spark plugs
Conclusion
Replace the spark plugs, if their working lifespan has ended. Ignoring this problem for long can lead to a breakdown of the engine and other vehicle systems. Follow AUTODOC’s recommendations and install the components that suit your car best.
@F. M.13.12.2022 14:46MemberHi'
There is a new model of spark plugs as manufactured by NGK. They are the Ruthenium spark plugs. I'm guessing not many people have had any experience using them or even herd of them.
Would appreciate your thoughts on these spark plugs.
Regards,
Francesco.
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