How Often Should You Replace Your VW’s Spark Plugs?

A failing spark plug can rapidly spark off all kinds of other engine problems. So it’s wise to know how often your spark plugs need replacing and also the warning signs of a faltering plug. There are three different types of plugs (copper, platinum, and iridium), each of which has a different lifespan. Here’s an overview of how long plugs last and if you suspect any of yours to be misfiring, have them checked at your local VW dealership.

How Often Should You Replace Your VW’s Spark Plugs?

Iridium Plugs: Durability and Conductivity Combined

The most advanced plugs around today are iridium plugs, which have a lifespan of about 100,000 miles. Iridium is extremely heat-resistant and also hard enough to form very thin electrodes which provide excellent conductivity: strong enough to match the conductivity of copper plugs. 

Platinum Plugs: Long-Lasting But Less Conductive

You can find plugs either made entirely from platinum or copper with platinum fused over the electrode. Both types of platinum plugs have a respectable average lifespan of about 60,000 miles. Platinum is also a tough and durable metal, but it’s not as conductive as copper, so you might lose a little in terms of engine performance. 

Copper Plugs: Highly Conductive With Lower Heat Resistance

The most common plugs are copper with a nickel alloy fused over the electrode. These plugs have the best conductivity which provides excellent combustion performance. But copper isn’t as heat-resistant as the other two metals, so the average lifespan of copper plugs tends to be only around 20,000 miles. 

Ask Your VW Dealer To Upgrade Your Plugs

If you’re unsure which type of plug you have in your car, you can always ask a technician at your local dealership. If you’re currently using copper plugs, you may be able to upgrade to longer-lasting platinum or iridium options. Although more expensive, these superior plugs last far longer, which can create cost savings over time. 

It’s usually unwise to downgrade in the opposite direction from iridium to platinum or copper, especially if your owner’s manual specifies iridium plugs for optimal engine performance. Check your owner’s manual and ask your technician for guidance on the best plugs for your model.  

Warning Signs of Failing Plugs

When a spark plug begins to fail because it’s been fouled by carbon residue or damaged by excessive heat and vibrations, your engine will start misfiring. This causes it to sputter and shudder and show clear indications of struggling. A misfiring engine will lose acceleration power, start idling roughly, and may even stall altogether. 

Have your plugs inspected by qualified technicians today at Tom Bush Volkswagen. We’re a local family-owned dealership that’s been serving the drivers of Jacksonville for over 50 years. 

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