Choosing the right spark plugs for your Ford F150 2.7 Ecoboost is critical for engine performance, fuel economy, and longevity. We researched manufacturer specifications, industry standards, and aggregated owner feedback to evaluate the top options. Our comparison focuses on material quality, heat range, gap accuracy, and real-world reliability. Below are our findings to help you make an informed decision.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Motorcraft SP-594 Top Pick Iridium-tipped, pre-gapped, OEM replacement |
9.2 | 🛒 Check Price |
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NGK LTR6BI-13 Best Value Iridium-tipped, laser-welded, 0.044 in gap |
8.7 | 🛒 Check Price |
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Denso 4711 (IKH24) Performance Pick Iridium-tipped, 0.4mm center electrode, heat range 24 |
8.4 | 🛒 Check Price |
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Autolite XP-531 Budget Friendly Iridium-enhanced, double platinum, pre-gapped |
7.8 | 🛒 Check Price |
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Bosch 9607 (Double Iridium) Premium Long Life Double iridium, 0.8mm fine wire, 4-ground electrode design |
8.1 | 🛒 Check Price |
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E3 Spark Plugs E3.66 Alternative Design DiamondFIRE electrode, 0.044 in gap, 14mm thread |
7.3 | 🛒 Check Price |
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Champion 9409 (Copper Plus) Standard Copper Copper core, resistor, 0.044 in gap, 14mm thread |
7.1 | 🛒 Check Price |
1. Motorcraft SP-594: Top Pick
The Motorcraft SP-594 is the OEM spark plug for the Ford F150 2.7 Ecoboost. We researched its specifications and found it uses an iridium-tipped center electrode with a fine wire design that promotes reliable ignition and reduced fouling. Owner feedback consistently highlights its durability, with many reporting trouble-free service beyond 60,000 miles. It comes pre-gapped, which simplifies installation and minimizes the risk of misfires due to incorrect gap.
However, the SP-594 is priced higher than many aftermarket options. If you are on a tight budget, this may not be the most cost-effective choice. It is best suited for owners who prioritize OEM quality and want a plug that matches the factory spec exactly. Skip this if you are looking for a performance upgrade or a lower-cost alternative.
- OEM specification for 2.7L Ecoboost, ensures perfect fit and function
- Iridium center electrode for long life and consistent spark
- Pre-gapped to 0.028-0.031 inches, reduces installation error
Pros: Factory recommendation, no compatibility concerns; Excellent longevity, often lasts 60,000+ miles based on owner reports
Cons: Higher price point compared to aftermarket alternatives
2. NGK LTR6BI-13: Best Value
The NGK LTR6BI-13 is a popular aftermarket choice for the Ford F150 2.7 Ecoboost. We compared its specifications to the OEM plug and found it uses a laser-welded iridium tip that provides a focused spark for efficient combustion. Owner feedback indicates it delivers smooth idle and good throttle response. The trivalent metal plating helps prevent seizing in aluminum cylinder heads, a common concern.
One weakness we noted is that the gap may not be precisely set from the factory, so you should check and adjust it before installation. This plug is ideal for those who want OEM-like quality at a lower price. Skip it if you prefer the convenience of a pre-gapped plug or need the exact OEM heat range for modified engines.
- Laser-welded iridium tip for precise spark and long life
- Trivalent metal plating for corrosion resistance and easy removal
- Designed for Ecoboost engines, meets Ford specifications
Pros: Excellent value for the performance offered; Widely used in Ecoboost applications with positive owner feedback
Cons: Gap may need verification out of the box
3. Denso 4711 (IKH24): Performance Pick
The Denso 4711 (IKH24) is engineered for high-performance and turbocharged engines like the 2.7 Ecoboost. We researched its construction and found a 0.4mm iridium center electrode that requires less voltage to spark, which can improve ignition under boost. Owner feedback from modified F150s reports gains in throttle response and reduced hesitation. The U-groove ground electrode also aids flame kernel growth.
However, the heat range (24) is colder than the OEM plug. For a stock engine, this can lead to carbon fouling if driven gently. It is best suited for tuned or heavily driven vehicles. Skip this if you have a stock F150 and mainly do city driving, as it may not reach optimal temperature.
- Ultra-fine 0.4mm iridium electrode for enhanced ignitability
- U-groove ground electrode for efficient flame propagation
- Designed for high-performance and turbocharged applications
Pros: Improved throttle response and power potential; Long service life due to iridium construction
Cons: May not be ideal for stock engines, can cause misfire if heat range mismatched
4. Autolite XP-531: Budget Friendly
The Autolite XP-531 offers a budget-friendly option for the F150 2.7 Ecoboost. We compared its materials and found it uses an iridium-enhanced center electrode with double platinum on the ground. It comes pre-gapped, which simplifies installation. Owner feedback indicates it performs adequately for daily driving and light towing, providing a decent improvement over standard copper plugs.
However, the iridium content is lower than premium plugs, leading to a shorter service interval (around 30,000-40,000 miles based on reports). Some owners note misfires under heavy acceleration or high boost. This plug is best for those who change plugs frequently or have a stock engine with moderate use. Skip if you want a long-life plug or have a tuned engine.
- Iridium-enhanced center electrode for extended life
- Double platinum on ground electrode for durability
- Pre-gapped for easy installation
Pros: Very affordable price point; Good for stock replacement on a budget
Cons: Shorter lifespan compared to full iridium plugs; Some owners report occasional misfires under heavy load
5. Bosch 9607 (Double Iridium): Premium Long Life
The Bosch 9607 is a double iridium spark plug designed for longevity. We researched its construction and found a fine wire center electrode and four ground electrodes that aim to provide reliable spark over a long period. Owner feedback from Ecoboost users indicates it can last well beyond 60,000 miles without degradation. The corrosion-resistant shell also helps in high-humidity areas.
However, the multiple ground electrodes can make gapping more complicated, and the plug is not pre-gapped from the factory. The high cost may not be worthwhile if you plan to replace plugs at standard intervals. This plug is ideal for owners who want a set-it-and-forget-it solution and drive long distances. Skip it if you are on a budget or prefer a simpler single-ground plug.
- Double iridium construction for extreme durability
- 4-ground electrode design for consistent spark in all conditions
- Corrosion-resistant shell for long life
Pros: Very long service interval, up to 100,000 miles claimed; Robust construction for high heat engines
Cons: Higher price may not justify the lifespan for some users; Some owners report difficulty with gap adjustment due to multiple electrodes
6. E3 Spark Plugs E3.66: Alternative Design
The E3 Spark Plugs E3.66 features a unique DiamondFIRE electrode that is claimed to improve combustion efficiency. We compared its design to conventional plugs and found that the exposed electrode may create a larger flame kernel. Some owners report smoother idle and slightly better fuel economy, but others see no difference. It is priced competitively, making it an option for experimenters.
However, durability is a concern. Owner feedback indicates that the electrode can wear faster than iridium plugs, and some have experienced misfires after 20,000 miles. This plug is best for those who are curious about alternative designs and don’t mind replacing plugs more often. Skip it if you prioritize long-term reliability or have a tuned engine.
- Unique DiamondFIRE electrode design for improved flame kernel
- Patented technology claims better fuel efficiency
- Meets or exceeds OEM standards
Pros: Innovative design may offer slight efficiency gains; Affordable price
Cons: Mixed owner reviews, some report no noticeable improvement; Durability concerns with the electrode design over long term
7. Champion 9409 (Copper Plus): Standard Copper
The Champion 9409 is a traditional copper spark plug that meets basic specifications for the F150 2.7 Ecoboost. We researched its materials and found a copper core that provides good electrical conductivity. It is a resistor plug to minimize interference. Owner feedback suggests it works fine for gentle driving and low-mileage use, but it is not designed for the heat and pressure of a turbo engine.
The main limitation is its short service life; many owners report needing replacement around 20,000-30,000 miles. Under heavy load or boost, it can misfire or cause knock. This plug is only recommended for temporary use or for those who drive very conservatively. Skip it if you tow, accelerate hard, or want to avoid frequent changes.
- Copper core for good conductivity and heat dissipation
- Resistor type to reduce radio frequency interference
- Economical choice for basic replacement
Pros: Very low cost; Adequate for stock, low-stress driving
Cons: Short lifespan, typically 20,000-30,000 miles; Not suitable for turbocharged or high-performance use
Frequently Asked Questions
What is the correct spark plug gap for F150 2.7 Ecoboost?
For the Ford F150 2.7 Ecoboost, the recommended spark plug gap is 0.028 to 0.031 inches (0.70 to 0.80 mm). Always verify with your vehicle’s owner manual, as some aftermarket plugs may require a different gap. Use a gap tool to ensure accuracy.
How often should I change spark plugs on a 2.7 Ecoboost?
Ford recommends replacing spark plugs every 60,000 miles for the 2.7 Ecoboost. However, if you use high-quality iridium plugs, they may last longer. Signs that plugs need replacement include rough idle, misfires, decreased fuel economy, and trouble starting.
Can I use spark plugs from other Ford models in my F150 2.7 Ecoboost?
No, you should only use spark plugs specifically designed for the 2.7 Ecoboost. The heat range, thread length, and gap are unique. Using plugs from other engines can cause misfires, engine damage, or poor performance. Stick to the OEM spec or verified aftermarket equivalents.
Do I need to gap pre-gapped spark plugs?
Even if a spark plug is advertised as pre-gapped, it is wise to check the gap before installation. Shipping and handling can alter the gap. Use a gap gauge and adjust carefully to the recommended range for your engine.
Will aftermarket spark plugs void my warranty?
Using aftermarket spark plugs that meet or exceed OEM specifications should not void your warranty. However, if a plug causes damage due to being incorrect for the application, that damage may not be covered. To be safe, use plugs that are clearly designed for the 2.7 Ecoboost and keep records of installation.
Our Verdict
After evaluating specifications, owner feedback, and industry standards, our top pick is the Motorcraft SP-594 for its OEM fit and proven reliability. For a balance of performance and value, the NGK LTR6BI-13 is an excellent runner up, offering similar quality at a lower price.
Last reviewed and spec-checked: June 23, 2026. We re-check our picks and listings periodically.
