The 5 Best Spark Plugs for Subaru Forester: Enhance Performance and Efficiency

(Last Updated On: October 1, 2024)

It's a coincidence that you're considering spark plugs just as many Subaru Forester owners are realizing their impact on performance. You might not think much about them, but the right spark plugs can truly transform your driving experience. From improved throttle response to enhanced fuel efficiency, the options available today can make a significant difference. So, what are the top contenders that can elevate your Forester's performance? Let's explore the best spark plugs that promise to optimize your engine's function and keep you on the road longer.

Quick Takeaways

  • OEM Genuine NGK Spark Plugs are cost-effective, reliable, and recommended for non-turbo Subaru models, ensuring optimal engine function.
  • NGK LKAR7BIX-11S Iridium IX Spark Plugs offer durability and improved throttle response, lasting up to 50,000 miles.
  • NGK 7090 BKR5EGP G-Power Spark Plugs enhance fuel economy and reduce emissions, ideal for eco-conscious drivers.
  • A-Premium Iridium Platinum Spark Plugs provide longevity of 80,000 to 100,000 miles, enhancing overall engine efficiency.
  • Genuine OEM Subaru Spark Plugs ensure compatibility and reliability, with users reporting improved gas mileage and power.

OEM Genuine NGK Spark Plugs Kit for Subaru Vehicles (Set of 4)

subaru ngk spark plugs

The OEM Genuine NGK Spark Plugs Kit is an excellent choice for Subaru Forester owners looking to maintain their vehicle's performance and reliability. This set of four spark plugs (part number 22401AA310) is designed specifically for non-turbo Subaru models, including the 1999-2004 Forester and other compatible vehicles. Weighing in at just 7.8 ounces, these plugs come sealed and ready for installation, ensuring quality and compatibility. Customers have rated this product 4.4 out of 5 stars, praising its performance and ease of installation. At under $2 per plug, it's a cost-effective option, especially considering the recommended change interval of 30,000 miles. Subaru enthusiasts appreciate the importance of sticking to OEM specifications for ideal engine function.

Best For: Subaru owners seeking reliable, OEM-quality spark plugs to enhance engine performance and maintain original specifications.

Pros:

  • Quality Assurance: OEM genuine parts ensure compatibility and reliability for various Subaru models.
  • Cost-Effective: At under $2 per plug, this kit offers a budget-friendly solution for maintaining your vehicle.
  • Positive Feedback: High customer ratings (4.4 out of 5 stars) highlight satisfaction with performance and installation ease.

Cons:

  • Limited to Non-Turbo Models: Not suitable for turbocharged Subaru vehicles, which may restrict usability for some owners.
  • Recommended Change Interval: Requires replacement every 30,000 miles, which could be seen as frequent maintenance.
  • Availability: May not be readily available at all local automotive stores, requiring online purchase.

NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack

iridium ix spark plug pack

For performance enthusiasts seeking reliable spark plugs for their Subaru Forester, the NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix) stands out with its advanced ignitability and throttle response. Designed with a 0.6mm laser-welded fine Iridium tip, these plugs guarantee durability and a stable spark. The tapered ground electrode minimizes electrical quenching, while the longer insulator nose helps prevent fouling. Users appreciate the easy installation and noticeable performance boosts, reporting smoother acceleration and improved fuel efficiency. Lasting between 30,000 to 50,000 miles, these competitively priced plugs offer excellent value compared to OEM alternatives. Despite some concerns about packaging, customer feedback highlights overall satisfaction with their reliability and efficiency, making them a solid choice for Subaru Forester owners.

Best For: Performance enthusiasts looking to enhance their Subaru Forester's ignition system and overall engine responsiveness.

Pros:

  • Superior performance: Improved throttle response and fuel efficiency reported by users.
  • Durability: 0.6mm laser-welded fine Iridium tip ensures long-lasting performance.
  • Cost-effective: Competitively priced compared to OEM alternatives, offering great value.

Cons:

  • Packaging concerns: Some users reported receiving plugs in unpadded envelopes, risking damage during shipping.
  • Installation gap check required: Users need to verify the spark plug gap before installation due to possible inconsistencies.
  • Limited compatibility: While suitable for many vehicles, not all models may be compatible with these specific plugs.

NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4

ngk g power spark plugs

Engineered to meet OEM specifications, the NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4, stands out as an excellent choice for Subaru Forester owners seeking reliable performance. This spark plug features trivalent metal plating, enhancing durability and providing anti-seizing protection. It's designed to increase fuel economy while lowering emissions, making it an eco-friendly option. Additionally, it reduces ignition system voltage requirements, ensuring efficient engine operation. Customers appreciate the easy installation, as the plugs come pre-gapped for specific vehicles. While many users report good performance and value, some have expressed concerns about authenticity and occasional early failures. With a 30-day return guarantee on Amazon, it offers peace of mind for buyers.

Best For: Subaru Forester owners seeking reliable and eco-friendly spark plugs that enhance engine performance.

Pros:

  • Easy installation with pre-gapped plugs suited for specific vehicles.
  • Increases fuel economy and lowers emissions, contributing to environmental sustainability.
  • Durable construction with trivalent metal plating for anti-seizing protection.

Cons:

  • Some users have raised concerns about product authenticity.
  • Reports of occasional early failures within a month of use.
  • Limited warranty information may lead to uncertainty for buyers.

A-Premium Iridium Platinum Spark Plugs (Pack of 4)

premium iridium spark plugs

Exceptional compatibility makes A-Premium Iridium Platinum Spark Plugs the ideal choice for Subaru Forester owners seeking reliable performance. This pack of four plugs fits various Subaru models, ensuring a perfect match for the Forester from 2004 to 2013. Designed with an iridium center electrode and platinum core, they offer exceptional ignitability, enhancing engine efficiency. With a recommended replacement interval of 80,000 to 100,000 miles, these spark plugs are engineered for longevity, making them a smart investment. Their specifications include a gap size of 0.030/0.032 inches and a resistance of 5000 ohms. A-Premium also provides a competitive return policy and warranty options through Amazon, ensuring customer satisfaction.

Best For: Subaru Forester owners looking for reliable and high-performance spark plugs for their vehicles.

Pros:

  • Exceptional ignitability enhances engine efficiency and performance.
  • Engineered for longevity with a recommended replacement interval of 80,000 to 100,000 miles.
  • Compatible with various vehicle models, making it a versatile choice for multiple brands.

Cons:

  • Limited to specific vehicle models, which may not suit all car owners.
  • Higher initial cost compared to standard spark plugs, despite longer lifespan.
  • Replacement may require professional installation, depending on user expertise.

Genuine OEM Subaru Spark Plugs Set of 4 for Forester, Impreza, Legacy, Crosstrek (2011-2017)

oem subaru spark plugs

Drivers of 2011-2017 Subaru models, including the Forester, Impreza, Legacy, and Crosstrek, will find the Genuine OEM Subaru Spark Plugs Set of 4 to be an excellent choice for maintaining peak engine performance. Designed specifically for non-turbo EJ25B and EJ20B engines, these spark plugs guarantee compatibility and reliability. Users appreciate their straightforward installation and report improved gas mileage and power, with original plugs lasting up to 73,000 miles without noticeable performance decline. Subaru recommends replacing them every 60,000 miles, but many have experienced longevity up to 100,000 miles. The set includes OEM-sealed items, assuring quality over cheaper aftermarket alternatives. Plus, Amazon's 30-day return policy offers peace of mind for buyers.

Best For: Drivers of 2011-2017 Subaru models seeking reliable and high-quality spark plugs for optimal engine performance.

Pros:

  • OEM quality ensures compatibility and reliability over aftermarket options.
  • Users report improved gas mileage and power after installation.
  • Straightforward installation process with plugs arriving correctly gapped.

Cons:

  • Higher price compared to some aftermarket alternatives.
  • Limited to non-turbo models, reducing applicability for turbocharged Subaru vehicles.
  • Replacement interval may be shorter than some users would prefer, with recommendations at 60,000 miles.

Factors to Consider When Choosing Spark Plugs for Subaru Forester

When choosing spark plugs for your Subaru Forester, you'll want to take into account several key factors. Compatibility with your specific model is essential, along with the type of spark plug that best suits your driving needs. Additionally, think about performance, longevity, installation ease, and how the pricing fits your budget.

Compatibility With Vehicle Models

Choosing spark plugs for your Subaru Forester is vital, as compatibility often varies between model years and engine types. To make certain you select the right plugs, check the specific model year and engine type. For instance, if you have a non-turbo engine, particularly the popular 2.5L variant, make sure the spark plugs align with those specifications.

It's also important to verify the manufacturer's part number. This helps confirm that the spark plugs meet Subaru's OEM standards, promoting peak performance and longevity. Don't forget to take into account the recommended replacement intervals; Subaru typically suggests changing spark plugs every 60,000 to 100,000 miles, depending on your specific model and driving conditions.

Type of Spark Plug

Selecting the right type of spark plug for your Subaru Forester can greatly influence your engine's performance and efficiency. You'll find three main types of spark plugs: standard copper, platinum, and iridium. Each type has its pros and cons, particularly concerning longevity and ignitability.

If you're looking for durability, iridium spark plugs are your best bet. They typically last over 80,000 to 100,000 miles, making them ideal for high-performance applications. Platinum plugs offer a good middle ground, lasting between 60,000 to 100,000 miles, while providing better durability than copper options.

Standard copper spark plugs are the most affordable but have a much shorter lifespan, usually around 20,000 to 30,000 miles. This means you'll need to replace them more frequently, which can lead to higher long-term costs.

When choosing spark plugs, verify the design—including electrode material and gap size—matches your Forester's specifications. This alignment is vital for achieving peak engine performance and fuel efficiency. By carefully considering the type of spark plug, you can make a significant difference in how well your Subaru Forester runs.

Performance and Longevity

Improving your Subaru Forester's performance hinges on the spark plugs you choose, as their quality directly impacts engine efficiency and responsiveness. When selecting spark plugs, consider the recommended replacement interval, which typically ranges from 60,000 to 100,000 miles. High-quality spark plugs can greatly enhance ignitability and throttle response, leading to better acceleration and fuel efficiency.

Using OEM spark plugs is often advised, especially for older models, as they maintain original specifications and guarantee compatibility, preserving engine performance over time. If you're seeking performance upgrades, consider high-performance spark plugs with iridium tips; they're designed for longevity and can last between 30,000 to 50,000 miles under normal driving conditions.

Installation Process

When tackling the installation of spark plugs in your Subaru Forester, it's crucial to take into account several key factors to guarantee a smooth process and peak engine performance. First, make certain you have the correct spark plug socket and torque wrench. Using improper tools can lead to damage during installation.

Next, verify the gap size of the spark plugs before installation. Typically, the gap should be around 0.030 to 0.032 inches for maximum performance. After that, follow the manufacturer's torque specifications when tightening the spark plugs, which generally range from 13 to 20 foot-pounds. This helps avoid over-tightening and potential damage to your engine.

Before you start installing, clean the area around the spark plug holes. This prevents debris from entering the combustion chamber, which can lead to performance issues. Finally, replace the spark plugs in a sequence to avoid confusion. This guarantees each cylinder receives the correct plug, maintaining your engine's performance and efficiency. By considering these factors, you'll enhance the longevity and functionality of your Subaru Forester's engine.

Pricing and Value

Finding the right spark plugs for your Subaru Forester involves weighing several factors that can impact both your wallet and your vehicle's performance. First, consider the cost per plug; OEM options typically range from under $2 to about $30 for high-performance alternatives. If you're looking to save, buying a set of four can be more economical. Many users report OEM plugs costing between $100 to $160, while aftermarket choices can offer significant savings.

Next, think about longevity. The recommended replacement interval for spark plugs is between 30,000 to 100,000 miles, which influences the overall value. Investing in higher-quality plugs might cost more upfront but could save you in the long run with fewer replacements.

Customer feedback often praises the cost-effectiveness of OEM plugs, highlighting that they meet original specifications for peak performance. Finally, check warranty and return policies; many sellers offer a 30-day return guarantee, allowing you to evaluate performance before fully committing. By considering these factors, you can make an informed decision that balances both cost and performance for your Subaru Forester.

Common Questions

How Often Should I Replace Spark Plugs in My Subaru Forester?

You should replace the spark plugs in your Subaru Forester every 30,000 to 60,000 miles, depending on your driving habits and conditions. If you notice rough idling or decreased fuel efficiency, it might be time to check them sooner. Regular maintenance can prevent issues and keep your engine running smoothly. Always consult your owner's manual for specific recommendations tailored to your model and year to guarantee peak performance.

Can I Use Aftermarket Spark Plugs in My Subaru Forester?

When it comes to your Subaru Forester, using aftermarket spark plugs can feel like choosing between a cozy sweater and a designer jacket. Sure, they can offer performance benefits, but you must verify they're compatible with your engine. Not all aftermarket options are created equal; some may even spark trouble down the road. So, always check reviews and specifications before making the switch to keep your ride running smoothly and efficiently.

What Symptoms Indicate Faulty Spark Plugs in My Forester?

If your Subaru Forester has faulty spark plugs, you might notice several symptoms. You could experience rough idling, decreased fuel efficiency, or a lack of acceleration. The engine might misfire, causing vibrations and unusual sounds. Additionally, you may see a check engine light illuminate on your dashboard. If you're experiencing any of these issues, it's a good idea to inspect your spark plugs and replace them if necessary.

Are Iridium Spark Plugs Better Than Copper for My Subaru?

When considering whether iridium spark plugs are better than copper for your Subaru, you'll find iridium offers longer life and better performance. They resist wear and handle higher temperatures, which means you'll enjoy improved fuel efficiency and fewer replacements. Copper plugs may provide better performance in some high-performance situations, but they wear out faster. Overall, if you want longevity and reliability, iridium plugs are often the superior choice for your vehicle.

Do Spark Plugs Affect Fuel Efficiency in the Subaru Forester?

You might not realize it, but spark plugs can greatly affect your Subaru Forester's fuel efficiency. When they're worn or dirty, they can lead to incomplete combustion, wasting fuel and power. On the flip side, high-quality spark plugs can guarantee peak performance, maximizing your mileage. So, if you're looking to improve efficiency, consider changing those spark plugs regularly. You'll not only save on fuel costs but also enhance your overall driving experience.

Wrapping Up

To sum up, choosing the right spark plugs for your Subaru Forester can truly transform your driving experience. From the reliable OEM options to the durable Iridium plugs, each choice contributes to enhanced efficiency and performance. So, don't delay—dive into the details and discover the delightful difference the perfect spark plugs can make. With the right selection, you'll enjoy a smoother, stronger, and more satisfying ride, ensuring your Forester performs at its peak!

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