4 Types of Spark Plugs (Copper vs Iridium vs Platinum vs Double Platinum)

Spark plugs are one of the most important components inside an internal combustion engine. Spark plugs ignite the air-fuel mixture needed to start and run your engine. Therefore, having the right spark plug in your vehicle is critical for optimal performance, longevity, and fuel efficiency. Four types of spark plugs are available today: copper, iridium, platinum, and double platinum. Each type has unique traits and benefits that should be considered when selecting which one is best for you.

Copper spark plugs

Due to their low cost, copper spark plugs are the most common type found in vehicles today. Copper spark plugs typically have a shorter lifespan than other types but still provide reliable performance over time. The biggest benefit of copper spark plugs is that they can handle higher temperatures than other types and operate efficiently in engines with larger displacements.

Iridium spark plugs

Iridium spark plugs are the next most popular type after copper. Iridium spark plugs have a much longer lifespan than the average copper plug, making them ideal for drivers who don’t want to change out their spark plugs frequently. They also have an extremely fine center electrode that allows for more precise ignition and better fuel economy. The downside of iridium spark plugs is their high cost compared to other types.

Platinum spark plugs

Platinum spark plugs can last up to 10 years or 100,000 miles before needing to be replaced. In addition, platinum has several advantages over copper and iridium, such as better fuel economy, lower emissions, quicker starts, and improved performance. The downside of platinum spark plugs is that they tend to be more expensive than other types and can be difficult to find in some regions.

Double Platinum spark plugs

Double Platinum spark plugs are the most expensive type available but offer the best longevity and performance over time. They feature two electrodes instead of one, which helps improve their efficiency and ability to handle higher temperatures with less wear. Double platinum plugs typically last up to 30,000 miles or three years before needing replacements.

What are spark plugs?

Spark plugs are a key component in an internal combustion engine. They create the spark that ignites the fuel-air mixture necessary for engine operation. The spark is created when a high voltage current flows from the ignition coil to the spark plug, passes through its center electrode, and then jumps across a gap to its outer metal shell. This causes an air/fuel mixture in the cylinder to ignite, resulting in an explosion that drives the pistons down and creates power.

How often should I replace my spark plugs?

It depends on the type of spark plug and your vehicle. Generally, most spark plugs should be replaced every 30,000 miles or every two years, whichever comes first. However, some modern vehicles may require a replacement more often due to technological advances. Therefore, it is always best to consult your owner’s manual for specific replacement recommendations for your vehicle.

What are the signs my spark plugs need replacing?

The most common symptom of failing spark plugs is poor engine performance, such as a loss of power or misfires. A decrease in fuel efficiency can also indicate that it is time to replace your spark plugs. Additionally, if you notice any strange noises from your engine or unusual vibrations when driving, this could be an indication that your spark plugs need to be replaced. It is always best to consult a qualified auto technician if in doubt. They can inspect your spark plugs, determine whether they are worn or damaged, and advise on the best action.

How much do new spark plugs cost?

The cost of new spark plugs varies depending on the type of vehicle and spark plug you require. Generally, spark plugs for most vehicles can range from $4 to $20 each. It is best to consult with a qualified auto technician who can estimate the cost of replacing your spark plugs. Additionally, it is always best to buy quality parts when replacing any part of your engine, as this will ensure that they last longer and perform better.

Are there any other maintenance tips I should keep in mind?

Yes! Regularly checking other key components in your car’s engine, such as the oil filter, air filter, coolant levels, and fuel filter, can help extend the life of your vehicle and save you money. Additionally, ensuring that your engine is regularly tuned can help ensure optimum performance and fuel efficiency. Finally, it’s important to stay up-to-date on manufacturer service bulletins, as these may provide additional information or recommendations for your particular car model.

Can I replace my spark plugs?

Yes, you can replace your spark plugs with the right tools and expertise. Follow the below-mentioned steps:

  • Ensure your car is parked in a safe, level area and the engine is cool.
  • Then, open the hood and locate the spark plugs.
  • Unscrew the old spark plug using an appropriate socket wrench or ratchet and remove it from its socket.
  • Inspect the old spark plug for signs of wear or damage.
  • Insert the new spark plug into its socket and tighten it with a wrench.
  • Repeat steps 3-5 for each spark plug in your car.
  • Lower the hood, start up your vehicle and listen for any unusual noises or vibrations that may indicate an installation problem.

What type of spark plugs should I use?

Using the type of spark plug recommended by your vehicle’s manufacturer is important. Using the wrong type can cause damage and affect performance. Additionally, it is always best to buy quality parts when replacing parts of your engine, as these will last longer and provide better performance.

What happens if I don’t replace my spark plugs?

If you do not replace your spark plugs, your vehicle may experience a decrease in performance and fuel efficiency. Additionally, the engine can become damaged over time due to worn or faulty spark plugs. Ultimately, this could result in costly repairs or even complete engine failure.


No matter what type you choose, it’s important to ensure your spark plugs are clean and free from debris for optimal performance and longevity. If you’re unsure which type of spark plug to use, it’s always best to consult a qualified auto technician who can offer the best advice for your vehicle. In addition, regularly replacing your spark plugs is essential for maintaining and improving your vehicle’s performance. These steps will help ensure you get the most out of your car and avoid costly repair bills down the line.

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