How long do iridium spark plugs last on a Subaru?
Iridium spark plugs are a popular choice for modern vehicles, including Subaru models, due to their durability and efficiency. If you're wondering how long these spark plugs last and when you should consider replacing them, this article will provide you with all the details you need to keep your Subaru running smoothly.
What Makes Iridium Spark Plugs Special?
Iridium spark plugs are designed with a fine electrode tip made of iridium, a metal known for its high melting point and durability. This design allows for better ignition performance, improved fuel efficiency, and a longer lifespan compared to traditional copper or platinum spark plugs.
Typical Lifespan of Iridium Spark Plugs in a Subaru
On average, iridium spark plugs in a Subaru can last between 60,000 to 120,000 miles, depending on various factors such as driving conditions, maintenance habits, and the specific Subaru model. Subaru vehicles are often equipped with iridium spark plugs from the factory, as they align with the brand's focus on reliability and performance.
Factors That Affect Spark Plug Longevity
While iridium spark plugs are built to last, their lifespan can be influenced by several factors:
- Driving Habits: Aggressive driving, frequent short trips, or stop-and-go traffic can cause spark plugs to wear out faster.
- Engine Condition: A well-maintained engine ensures optimal spark plug performance, while issues like oil leaks or carbon buildup can shorten their lifespan.
- Environmental Conditions: Extreme temperatures or dusty environments can contribute to faster wear and tear.
Signs It's Time to Replace Your Spark Plugs
Even with their extended lifespan, iridium spark plugs will eventually need replacement. Watch out for these warning signs:
- Reduced Fuel Efficiency: A noticeable drop in miles per gallon could indicate worn spark plugs.
- Engine Misfires: If your engine hesitates or misfires, it might be time to check the spark plugs.
- Rough Idling: A rough or uneven idle can be a symptom of failing spark plugs.
- Difficulty Starting: Trouble starting your Subaru could be due to worn spark plugs struggling to ignite the fuel-air mixture.
When Should You Replace Iridium Spark Plugs?
Subaru typically recommends replacing iridium spark plugs every 100,000 miles as part of routine maintenance. However, it's always a good idea to consult your vehicle's owner manual or speak with a trusted mechanic to determine the best interval for your specific model and driving conditions.
Conclusion
Iridium spark plugs are a reliable and long-lasting component of your Subaru's engine, offering excellent performance and efficiency. By keeping an eye on their condition and replacing them at the recommended intervals, you can ensure your Subaru continues to deliver the dependable performance you expect. If you're unsure about the state of your spark plugs or need assistance with replacement, don't hesitate to reach out to a professional auto service like Kevin's Autos for expert advice and service.
Frequently Asked Questions
What are the disadvantages of iridium spark plugs?
Cons of Iridium Spark Plugs
- Iridium spark plugs are much more expensive than platinum and copper spark plugs.
- In terms of like-for-like performance, an iridium spark plug is on par with a good quality platinum spark plug, which is usually available for less money.
How do I know if my iridium plugs are worn out?
Signs of Worn Spark Plugs
Rough idling. You hear strange noises such as knocking or rattling coming from your engine as you drive as well as feel unusual vibrations because your engine misfires. Slow acceleration.
How much does it cost to replace spark plugs with iridium?
Platinum- or iridium-tipped plugs using laser technology cost the most: as much as $25 each. You can pay between $16 and $100 for a set of spark plugs, depending on the type of plugs you need and the number of cylinders your engine has.
How do I know if my Subaru spark plugs are bad?
One of the first signs of spark plug wear is trouble starting your Subaru. If the engine cranks longer than usual before starting or if you experience intermittent starting issues, it's time to inspect your spark plugs.
How often should you change NGK iridium spark plugs?
NGK gives them a life expectancy of 40-50k miles. But they have to temper their projections as driving conditions and motor modifications differ. Typically we have found you can expect 60,000 to 80,000 miles on an unaltered motor. NGK Laser Iridium Spark Plugs have iridium center and a platinum ground electrodes.
How long do iridium spark plugs last on Subaru?
OEM is NGK Iridium spark plugs, with a recommended change interval of 60K miles.
What is the life expectancy of iridium spark plugs?
100,000 miles
Recommended Spark Plug Replacement Intervals:
Platinum Spark Plugs: Platinum spark plugs have a longer lifespan and may last up to 60,000 miles or more before replacement is necessary. Iridium Spark Plugs: Iridium spark plugs are known for their durability and longevity, often lasting up to 100,000 miles or more.
How often should you replace spark plugs on a Subaru?
every 30,000 miles
Experts generally recommend replacing spark plugs every 30,000 miles for the best results. If one of your Subaru spark plugs gets out of whack, it can cause a reduction in gas mileage and engine problems later on.
Which spark plugs last longer iridium or platinum?
Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.
Do iridium spark plugs really last 100,000 miles?
Typically we have found you can expect 50-80k miles on a traditional iridium plug.
