What mileage do 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 critical maintenance task is replacing your spark plugs. But how often should you do this? In this article, we’ll explore the recommended mileage intervals for spark plug replacement on Subaru vehicles and why this maintenance step is so important.
Recommended Mileage for Spark Plug Replacement
The mileage at which you should replace spark plugs on a Subaru depends on the type of spark plugs used and the specific model of your vehicle. Subaru typically uses two types of spark plugs: copper and iridium. Here’s a general guideline:
- Copper Spark Plugs: These are less durable and should be replaced approximately every 30,000 miles.
- Iridium Spark Plugs: These are more durable and can last up to 60,000 to 100,000 miles, depending on the model and driving conditions.
It’s always a good idea to consult your Subaru owner’s manual for the exact recommendation for your specific model and year. Regular maintenance ensures your engine runs smoothly and prevents potential issues down the road.
Signs That Your Spark Plugs May Need Replacement
Even if you haven’t reached the recommended mileage, certain signs may indicate that your spark plugs are due for replacement. Watch out for the following:
- Engine Misfires: If your engine is misfiring or running rough, worn spark plugs could be the culprit.
- Decreased Fuel Efficiency: A drop in gas mileage may indicate that your spark plugs are not firing efficiently.
- Difficulty Starting the Engine: Faulty spark plugs can make it harder to start your car.
- Check Engine Light: A lit check engine light could be a sign of spark plug issues.
If you notice any of these symptoms, it’s best to have your spark plugs inspected and replaced if necessary. Ignoring these signs can lead to more significant engine problems.
Why Regular Spark Plug Maintenance Matters
Replacing spark plugs at the recommended intervals is crucial for several reasons:
- Improved Engine Performance: Fresh spark plugs ensure your engine runs smoothly and efficiently.
- Better Fuel Economy: Properly functioning spark plugs help optimize fuel combustion, saving you money at the pump.
- Reduced Emissions: Healthy spark plugs contribute to cleaner emissions, which is better for the environment.
- Preventing Costly Repairs: Neglecting spark plug maintenance can lead to engine damage, which is far more expensive to repair.
By staying on top of spark plug maintenance, you can avoid unnecessary headaches and keep your Subaru running like new.
Conclusion
For most Subaru models, spark plug replacement is recommended every 30,000 to 100,000 miles, depending on the type of spark plugs and driving conditions. Always refer to your owner’s manual for the most accurate guidance. If you’re unsure or need assistance, don’t hesitate to bring your vehicle to a trusted auto repair shop like Kevin’s Autos. Regular maintenance is the key to keeping your Subaru reliable and efficient for years to come.
Frequently Asked Questions
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.
Do spark plugs really last 100 000 miles?
How long spark plugs last varies with different cars and different types of spark plugs. 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.
Is it easy to replace Subaru spark plugs?
Replacing spark plugs is something you can do at home within an hour as long as you have the following tools: Appropriately sized spark plug socket. 8-10mm sockets. Ratchet and extensions.
How long do OEM Subaru spark plugs last?
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.
How can you tell when spark plugs need to be replaced?
Here are four signs that it's time to replace your vehicle's spark plugs.
- The check engine light is on.
- Your car doesn't accelerate well.
- You hear strange noises.
- You visit the gas station more often.
- Your car won't start.
- The owner's manual says so.
- Benefits of replacing old or worn spark plugs.
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 do Subaru spark plugs need replaced?
To extend the life of your Subaru spark plugs and ensure your engine runs smoothly, regular maintenance is key. This includes following Subaru's recommended service intervals—typically every 60,000 miles for standard replacements. However, this can vary based on your driving habits and the specific Subaru model.
How often should you change spark plugs on a 2016 Subaru Outback?
around 30,000 miles
Eventually, at around 30,000 miles to as high as 40,000 miles, conventional spark plugs will wear out, which could cause stalling, starting problems and engine misfires. Higher-cost platinum-tipped spark plugs may not need to be replaced as often.
How long do Subaru OEM 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.
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.
