The era of changing spark plugs every couple of years has fortunately come to an end. Thanks to advancements in automotive technology, spark plugs now last longer and perform better than ever. Here’s a look at some of the factors that have contributed to the extended lifespan of spark plugs and how modern engine management systems have transformed the way vehicles function. 

The Evolution of Spark Plug Technology

Manufacturers use precious and other metals in the center and side electrodes of spark plugs, which act as a conduit for the high voltage received from the spark plug wires. This allows the spark to jump across the small gap between the central and side electrodes to start the combustion process. 

In the past, copper core spark plugs were the standard choice—and they’re still used today. Although nearly all spark plugs feature a copper core, modern spark plugs also incorporate superior materials like platinum and iridium. These metals offer exceptional durability and wear that help the spark plugs last longer while also minimizing the misfire rate. Modern spark plugs can better withstand the rigors of today’s high-performance engines than conventional copper core spark plugs.

There are numerous benefits to be had from modern spark plugs. Not only do they last longer and save drivers money on the cost of replacements, but they also improve engine performance and fuel efficiency. Long-lasting spark plugs help optimize the combustion process, which contributes to a smoother ride, reduced emissions, and significant savings on fuel costs. 

The extended lifespan of spark plugs also has a positive impact on the environment. With fewer spark plugs being replaced and disposed of, the automotive industry contributes less waste and has a lower environmental footprint. 

Spark Plug Maintenance

Even though modern spark plugs are engineered for longevity and durability, proactive maintenance is still essential to keep your engine operating at its best. Spark plugs will eventually become less effective over time, whether due to age, wear, or electrical or ignition system issues. 

They can also become damaged by contamination, combustion, or overheating. When this happens, they lost the ability to ignite the air-fuel mixture effectively, as well as dissipate heat from the combustion chamber. In addition, the gap between the plugs’ electrodes widens with time—which means the spark has to travel a further distance to initiate combustion. Eventually, this can cause the combustion process to become irregular or erratic. 

Fortunately, modern spark plugs don’t need to be replaced often; most manufacturers suggest replacing them around every 100,000 miles. However, it’s important to note that spark plug replacement intervals vary depending on your engine, its condition, and the type of spark plug you use. Some manufacturers may also recommend more or less frequent replacements depending on your vehicle’s year, make, and model. 

There are several signs that indicate your spark plugs may need to be replaced, including:

• Pinging, rattling, or knocking noises coming from the engine
• Difficulty starting your engine or starts that feel disjointed and jerky
• Poor performance, especially when accelerating
• Poor fuel economy

If you’ve noticed any of these signs, we recommend scheduling an inspection.

The Importance of Professional Spark Plug Installation

Modern engines are becoming increasingly complex, so although changing the spark plugs used to be a DIY job back in the day, it’s now best to leave replacement to qualified technicians—especially if you have performance modifications. 

Aftermarket parts or performance mods may demand specific spark plug characteristics to accommodate the enhanced engine dynamics. Whether you have performance modifications or a completely stock vehicle, professional installation ensures that your spark plugs are fitted correctly and that your engine operates at peak efficiency. 

If you need your spark plugs replaced or inspected, EuroCar Service is here to help! We specialize in complete care for European makes, including Audi, BMW, Mercedes, Land Rover, Mini-Cooper, Fiat, Volvo, Volkswagen, Saab, Jaguar, and Smart Car. Schedule an appointment with us today at (206) 527-8828, or request an appointment through our online form.  

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