How often should you change spark plugs on a Subaru?
As a Subaru owner, keeping your vehicle in top condition is essential for performance, fuel efficiency, and longevity. One of the most critical yet often overlooked maintenance tasks is changing the spark plugs. In this article, we’ll explore how often you should replace spark plugs on a Subaru and why it’s important to stay on top of this maintenance task.
Why Are Spark Plugs Important?
Spark plugs play a vital role in your Subaru’s engine. They ignite the air-fuel mixture in the combustion chamber, which powers your car. Over time, spark plugs wear out, leading to reduced engine performance, lower fuel efficiency, and potential engine misfires. Regular replacement ensures your Subaru runs smoothly and efficiently.
Recommended Spark Plug Replacement Intervals for Subarus
The frequency of spark plug replacement depends on the type of spark plugs your Subaru uses and the specific model of your vehicle. Here’s a general guideline:
- Standard Copper Spark Plugs: These typically need to be replaced every 30,000 miles. They are less durable but often used in older Subaru models.
- Platinum Spark Plugs: These last longer, with a replacement interval of around 60,000 miles. They are more common in mid-range Subaru models.
- Iridium Spark Plugs: Found in newer Subaru models, these high-performance plugs can last up to 100,000 miles.
Always refer to your Subaru’s owner’s manual for the manufacturer’s specific recommendations, as intervals may vary depending on the model and year.
Signs That Your Spark Plugs Need Replacement
Even if you’re following the recommended intervals, it’s essential to watch for signs that your spark plugs may need attention sooner. Here are some common indicators:
- Difficulty starting your engine
- Reduced fuel efficiency
- Rough idling or engine misfires
- Sluggish acceleration
- Check engine light illuminated
If you notice any of these symptoms, it’s a good idea to have your spark plugs inspected by a professional mechanic.
Why Professional Replacement Matters
While some car enthusiasts may choose to replace spark plugs themselves, it’s often best to leave this task to a professional, especially for Subarus. Modern Subaru engines can be complex, and accessing the spark plugs may require specialized tools and expertise. A professional mechanic will ensure the job is done correctly, avoiding potential damage to your engine.
Conclusion
Regular spark plug replacement is a simple yet crucial part of maintaining your Subaru. By following the recommended intervals and paying attention to warning signs, you can keep your vehicle running smoothly and efficiently for years to come. If you’re unsure about the condition of your spark plugs or need assistance, don’t hesitate to reach out to a trusted auto repair shop like Kevin’s Autos. We’re here to help you keep your Subaru in peak condition!
Frequently Asked Questions
How do I know when my spark plugs need replacing?
Here are seven signs that are telling you that you need spark plug replacement on your vehicle.
- Your Vehicle is Difficult to Start.
- Your Engine is Misfiring.
- You Have Poor Fuel Economy.
- Your Engine Idles Rough.
- Your Car Doesn't Accelerate Easily.
- Your Engine is Loud.
- Your “Check Engine” Light Comes On.
What happens if I don't change spark plugs?
When it happens, it can cause the engine to run rough and can even decrease fuel economy. In extreme cases, it can even cause engine damage. Fouling is another problem that can occur if you don't change your spark plugs. It happens when the spark plugs get covered in carbon deposits, oil, or fuel.
Why replace spark plugs at 60,000 miles?
If it's a lifetime spark plug or one that can last up to 100,000 miles, it may be a good idea to replace them at 50,000 or 60,000 miles. Based on the metal the cylinder head and spark plugs consist of, they could seize inside the cylinder head and you won't be able to get them out.
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 long do Subaru spark plugs last?
While the answer depends on the make and model of your vehicle, as a good example, the newest Subaru BOXER® engines are built with spark plugs made of ultra resilient materials, such as platinum. This allows them to be replaced about every 60,000 miles.
Can spark plugs last 10 years?
Even if you're not having problems, you'll still want to change spark plugs out at every 30,000-mile interval. For most drivers, that will mean that you're due for spark plug service once every 2-3 years!
How often do spark plugs need to be replaced on a Subaru Outback?
around 30,000 miles
Keeping Your Subaru in Prime Condition
The plugs in your ignition might be small, but they pack a punch when it comes to performance. They usually need to be replaced around 30,000 miles, but if you frequently tackle tough conditions or take long trips, you might need to swap them out a bit sooner.
Can spark plugs last 200,000 miles?
Older cars often had to have their spark plugs replaced every 5,000 to 10,000 miles, while some newer cars — with computer controls and more modern plugs — can go more than 100,000 miles on a set of plugs. As is often the case, the best source of service information for your vehicle is the owner's manual.
What are the symptoms of old spark plugs?
Your driving habits also play a crucial role in spark plug wear. If your car shows any of the faulty spark plug symptoms mentioned earlier, such as difficulty starting, rough idling, decreased fuel efficiency, or misfires, it's a sign you need to replace your spark plugs.
What are the signs of a bad spark plug?
What are the signs your Spark Plugs are failing?
- Engine has a rough idle. If your Spark Plugs are failing your engine will sound rough and jittery when running at idle.
- Trouble starting. Car won't start and you're late for work… Flat battery?
- Engine misfiring.
- Engine surging.
- High fuel consumption.
- Lack of acceleration.
