Types of Spark Plug

Here are the 5 types of spark plugs. So, let's get started.

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NUMBER 1.

Copper/Nickel Spark Plugs

Copper/nickel spark plugs use a nickel alloy coating for the electrode, with its inner core being primarily copper. Copper is a soft metal, which means that it would instantly melt if it were ever subjected to extreme heat. It’s common for most spark plugs to have copper cores, as it makes for an excellent electrical conductor. As a result of their cheaper price tag, the lifespan of a copper/nickel spark plug is considerably shorter than that of other spark plugs. 

NUMBER 2.

Single Platinum Spark Plugs

As the name would suggest, these contain a platinum centre electrode. Although platinum-tipped spark plugs are slightly more pricey than other alternatives, they’re impressively long-lasting, especially under normal driving conditions. Platinum is harder than a nickel alloy, which means it doesn’t erode in the same way that nickel ones do. Therefore, if your car has them fitted as standard, it’s advised that you don’t change them out for copper/nickel ones – especially if you have a modern car.

NUMBER 3.

Double Platinum Spark Plugs

Double platinum spark plugs use platinum plating, not only on the centre but on the ground electrode too. These aren’t exactly budget-friendly, coming in at one of the most expensive spark plugs on the market. They also manage to yield slightly higher performance than that of single, long-life platinum plugs, something they’re well-known for.

NUMBER 4.

Iridium Spark Plugs

Iridium is highly corrosion-resistant, and able to withstand temperatures of up to 2000°C. Iridium-tipped spark plugs can allow for smoother-running engines as a result of more complete combustion. As well as this, they also have a considerably longer life span than that of copper/nickel spark plugs, sometimes lasting as long as platinum spark plugs. Iridium spark plugs are the most expensive spark plugs that are available, featuring a ‘fine-wire’ centre that is designed to better conduct electrical energy.

NUMBER 5.

Silver Spark Plugs

The centre electrode tip of a silver spark plug is made from a silver alloy, ensuring a relatively long lifespan (although not quite the same as platinum spark plug longevity), with ignition sparks of increased energy. They also have the best thermal conductivity in comparison to other spark plugs and are highly resistant to material erosion. These spark plugs also feature a ribbed insulator design which can prevent your car from misfiring. Generally, Silver spark plugs are fitted in older, European high-performance vehicles, and have even been known to be fitted in motorcycles.

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