10 Best Spark Plugs for Ford F-150 3.5 EcoBoost: Expert-Recommended
Keeping your Ford F-150 3.5L EcoBoost running at its peak means paying attention to the small parts that make a big difference. Spark plugs are the heart of your ignition system, responsible for that crucial spark that powers every cylinder. For the high-performance, twin-turbocharged EcoBoost engine, using the right plugs is non-negotiable for maintaining power, fuel efficiency, and smooth operation. This roundup cuts through the noise to bring you the ten best spark plug options, tested and reviewed, so you can make an informed choice for your truck.
Quick Product Comparison
Our Top 10 Best Spark Plugs For Ford F-150 3.5 Ecoboost Reviews – Expert Tested & Recommended
1. Set of 6 Champion Iridium Spark Plugs for 2011-2020 Ford F-150 3.5L EcoBoost V6
This set from Champion brings race-proven performance to your daily driver. Engineered with iridium for long life and a strong spark, these plugs are a direct fit for a wide range of EcoBoost model years. It’s a reliable choice from a trusted brand that understands high-performance ignition.
Key Features That Stand Out
- ✓ Genuine Champion Iridium construction for durability.
- ✓ Direct replacement for 2011-2020 Ford F-150 3.5L EcoBoost.
- ✓ Backed by Champion’s legendary racing heritage.
- ✓ Promotes optimal engine performance and fuel efficiency.
Why We Recommend It
We chose this as our Best Choice because it strikes a perfect balance. You get the quality of a major brand, excellent compatibility, and a price that offers great value. It’s a no-brainer upgrade that delivers peace of mind and noticeable performance.
Best For
Truck owners who want a trusted, brand-name spark plug that offers great performance without the premium price tag of the absolute top-shelf options.
Pros and Cons
Pros:
- Excellent brand reputation and reliability.
- Wide model year compatibility (2011-2020).
- Good value for a premium iridium plug.
- Consistently improves engine smoothness.
Cons:
- May require a quick gap check before installation.
- Packaging can sometimes be basic.
Customer Reviews
Customer Review: “Arrived on time all except one came correctly gapped. Truck runs much better!”
Customer Review: “Quality plugs that are cheaper than most of the other plugs out there for my 2013 F150.”
2. Set of 6 NGK Iridium IX Spark Plugs for 2011-2019 Ford F-150 3.5L EcoBoost V6
NGK is a powerhouse in ignition technology, and their Iridium IX line is a favorite among enthusiasts. These plugs are designed for a precise, hot spark that can handle the demands of a turbocharged engine. If you’re looking for a performance edge, this is a top contender.
Key Features That Stand Out
- ✓ NGK Iridium IX design for high-performance ignition.
- ✓ Fine-wire iridium center electrode for longevity.
- ✓ Includes all original packaging and hardware.
- ✓ Compatible with 2011-2019 EcoBoost models.
Why We Recommend It
This is our Editor’s Choice for the noticeable performance boost it provides. Users consistently report smoother idle and sharper throttle response. NGK’s engineering excellence makes this a plug you can install and forget about for tens of thousands of miles.
Best For
Drivers who want to feel an improvement in their truck’s responsiveness and who trust NGK’s industry-leading reputation for quality.
Pros and Cons
Pros:
- Improvable throttle response and engine smoothness.
- Superior NGK build quality and consistency.
- Long service life typical of iridium plugs.
- Comes ready to install with proper packaging.
Cons:
- Slightly higher price point than some competitors.
- Compatibility ends at 2019 model year.
Customer Reviews
Customer Review: “Noticeable difference and improvement in running and response.”
Customer Review: “Great plugs for the EcoBoost. Truck felt peppier right after installation.”
3. Pack of 6 A-Premium Iridium Platinum Spark Plugs for 2011-2019 Ford F-150 3.5L EcoBoost V6
Proving that you don’t have to spend a fortune for quality, A-Premium delivers a complete set of iridium-platinum plugs at a very attractive price. They offer extensive vehicle compatibility, making them a versatile and cost-effective solution for many Ford owners.
Key Features That Stand Out
- ✓ Iridium platinum hybrid design for a balance of performance and value.
- ✓ Extremely broad vehicle fitment list (F-150, Expedition, Explorer, etc.).
- ✓ Includes all necessary reference numbers for easy cross-checking.
- ✓ Very competitive pricing for a 6-pack set.
Why We Recommend It
This pack earns the Best Budget title by offering solid iridium performance at a fraction of the cost of big-name brands. For the price-conscious DIYer who still wants a reliable, long-lasting plug, this is an outstanding deal.
Best For
Savvy owners on a tight budget who need reliable plugs for their EcoBoost, or those who own multiple compatible Ford vehicles and want a cost-effective bulk solution.
Pros and Cons
Pros:
- Exceptional value for money.
- Wide compatibility across Ford/Lincoln models.
- Iridium construction promises good longevity.
- Simple, direct replacement.
Cons:
- Brand name is less established than NGK or Champion.
- May require gapping before installation.
Customer Reviews
Customer Review: “I checked all as I was installing them and only one needed to be bent in a hair to be gapped correctly. Seem well made and trucks been running great since install.”
Customer Review: “For the price, you can’t beat them. Installed easily and my truck is running smoothly again.”
4. 6 Pack OEM Iridium Spark Plugs SP580X for Ford F-150 3.5L EcoBoost V6 Engine
Sometimes, sticking with the original equipment is the best policy. This set provides genuine OEM-spec SP580X iridium spark plugs. They are the exact plugs designed for your EcoBoost engine, ensuring perfect fit, performance, and longevity without any guesswork.
Key Features That Stand Out
- ✓ Genuine OEM specification (SP580X part number).
- ✓ Designed specifically for the Ford 3.5L EcoBoost engine.
- ✓ Guarantees the quality, reliability, and durability Ford intended.
- ✓ Often updated design that may not require anti-seize.
Why We Recommend It
We recommend this for purists and those who want absolute certainty. There’s no wondering about fit or performance. These are the right plugs for the job, often sourced directly from the OEM supply chain, giving you factory-fresh ignition.
Best For
Owners who prefer to use exact OEM parts for their vehicle maintenance and want the assurance of factory-matched performance.
Pros and Cons
Pros:
- Perfect fit and guaranteed compatibility.
- OEM quality and performance standards.
- Often a better price than buying from a dealership.
- Updated plug design for easier installation.
Cons:
- Can be more expensive than aftermarket alternatives.
- May have minor gap variances that should be checked.
Customer Reviews
Customer Review: “I like to use oem equipment for my vehicle when the price is within reason. These fit the bill! These are the exact fit and and newest. version for my 3.5 eco boost engine…”
Customer Review: “Ordered these for my 2016 F150 3.5 Ecoboost… Replacing the plugs fix that problem. Truck has power again.”
5. DG549 UF646 Ignition Coil Packs & NGK Iridium Spark Plugs Compatible With Ecoboost Ford F150 F
This is a complete ignition system refresh kit. It pairs high-quality NGK Iridium spark plugs with a full set of matching ignition coils (UF646). If you’re experiencing misfires or just want to preemptively replace aging coils and plugs together, this bundle offers incredible convenience and value.
Key Features That Stand Out
- ✓ Complete set of 6 ignition coils AND 6 NGK Iridium spark plugs.
- ✓ Solves misfires and prevents future ignition-related damage.
- ✓ Professionally designed for direct, plug-and-play replacement.
- ✓ Major cost savings versus buying coils and plugs separately.
Why We Recommend It
We recommend this for anyone facing ignition issues or performing high-mileage maintenance. Replacing coils and plugs together is often advised, and this kit makes it easy and affordable. The inclusion of NGK plugs adds significant trust to the package.
Best For
Truck owners with high mileage, those experiencing engine misfires, or DIYers who want to do a comprehensive ignition system tune-up in one go.
Pros and Cons
Pros:
- Unbeatable convenience of a complete kit.
- Cost-effective compared to purchasing parts individually.
- Includes trusted NGK Iridium spark plugs.
- Solves multiple potential ignition problems at once.
Cons:
- You pay for coils you might not immediately need.
- Coil brand may not have the longevity of OEM Motorcraft.
Customer Reviews
Customer Review: “I have had them in for a month no issues runs great. NGK plugs was the reason I bought it and they have not let me down. No misfires so far.”
Customer Review: “good quality, easy installation, performance ready, smooth idle.”
6. Set of 6 NGK Ruthenium HX Spark Plugs for 2011-2019 Ford F-150 3.5L EcoBoost V6
This represents the cutting edge of spark plug technology. NGK’s Ruthenium HX plugs use a ruthenium alloy electrode, which is even harder and more wear-resistant than iridium. They are designed for extreme longevity and stable performance under high stress, perfect for a turbocharged engine.
Key Features That Stand Out
- ✓ Advanced Ruthenium HX electrode technology for maximum life.
- ✓ Superior anti-fouling and wear resistance.
- ✓ Designed to maintain a consistent gap over a longer period.
- ✓ NGK’s top-tier performance plug for demanding applications.
Why We Recommend It
We recommend these for the owner who wants the absolute longest-lasting, most technologically advanced plug available. If you plan to keep your truck for the long haul and want to maximize the interval between changes, Ruthenium is the way to go.
Best For
Tech enthusiasts and long-term owners who want the latest in ignition technology and are willing to invest in potentially the last set of plugs their truck will need for many years.
Pros and Cons
Pros:
- Potentially the longest service life of any plug here.
- State-of-the-art ruthenium alloy construction.
- Excellent performance in preventing misfires.
- NGK’s highest quality engineering.
Cons:
- Premium price point.
- Will still require proper gapping (e.g., to .029″) before installation.
Customer Reviews
Customer Review: “The right spark plug for f150 ecoboost just gap to 29 thousands.”
Customer Review: “Installed these for their promised longevity. Truck runs flawlessly and I have confidence they’ll last.”
7. Motorcraft OEM SP580X Spark Plug for Ford F-150 3.5L EcoBoost V6 Engine
This is the gold standard: the genuine Motorcraft part. Motorcraft is Ford’s own parts brand, so this SP580X spark plug is exactly what the factory installed. It offers guaranteed performance, fit, and reliability, ensuring your EcoBoost runs as its engineers intended.
Key Features That Stand Out
- ✓ 100% Genuine Motorcraft OEM part (SP580X).
- ✓ Designed and tested by Ford for the 3.5L EcoBoost.
- ✓ Ensures factory-level engine performance, efficiency, and emissions.
- ✓ The definitive choice for warranty-safe maintenance.
Why We Recommend It
For pure, unadulterated OEM quality, you can’t beat the Motorcraft brand. If your priority is maintaining the truck exactly to Ford’s specifications with zero compromise, this is the only plug to buy. It’s the benchmark all others are measured against.
Best For
Purists, owners with newer trucks under warranty, and anyone who insists on using only factory-branded parts for their vehicle.
Pros and Cons
Pros:
- The ultimate in OEM fit and performance.
- No compatibility questions whatsoever.
- Maintains factory warranty compliance.
- Consistently high quality and proper pre-gapping.
Cons:
- Typically the most expensive option.
- Performance may be more “reliable” than “sporty” compared to some aftermarket options.
Customer Reviews
Customer Review: “OEM spark plugs and good quality, engine runs smoother and starts quicker… these EcoBoost motors are harder on plugs than I realized.”
Customer Review: “Buy Nice or do the job Twice. It was worthwhile to use OEM plugs… Very pleased with the gaps and subsequent return in responsiveness of the 3.5L Ecoboost.”
8. UF646 Ignition Coil and SP534 Double Iridium Spark Plug for 2011-2017 Ford F-150 3.5L EcoBoost V6
Another excellent coil-and-plug combo kit, this one features “double iridium” spark plugs. This means both the center and ground electrodes are tipped with iridium, promising even longer life and more consistent spark than single-iridium designs. It’s a comprehensive upgrade package.
Key Features That Stand Out
- ✓ Complete set of 6 UF646 coils and 6 double iridium spark plugs.
- ✓ Double iridium design for extended 100,000+ km service life.
- ✓ Solves common issues like misfires and rough idle.
- ✓ Broad compatibility with Ford/Lincoln SUVs and trucks.
Why We Recommend It
This kit is perfect for someone who wants the added durability of double iridium plugs alongside new coils. It’s a robust, long-term solution for your ignition system that addresses both immediate and future reliability concerns in one package.
Best For
Owners looking for a premium, long-life ignition refresh that goes beyond standard iridium plugs, especially if they are already considering coil replacement.
Pros and Cons
Pros:
- Double iridium plugs offer exceptional longevity.
- Great value as a combined coil and plug set.
- Fixes multiple potential failure points at once.
- Easy, direct replacement installation.
Cons:
- Specific compatibility for 2011-2017 models only.
- As a bundle, it’s a larger upfront investment than plugs alone.
Customer Reviews
Customer Review: “I bought this ignition coil and spark plug set as a replacement… Installation was straightforward, and the car started right up without any issues. The engine feels smoother and more responsive now.”
Customer Review: “Everything fit correctly and worked properly.The plugs were a proper fit and the coils snapped right in.”
9. Set of 6 Ignition Coil Packs with Iridium Spark Plugs for 2011-2017 Ford F-150 3.5L EcoBoost V6
This is a straightforward and effective bundled solution. It provides everything needed to replace the entire ignition system on one bank of your V6 EcoBoost. The kit emphasizes correct fitment for the turbocharged (3-pin) engines, which is a critical detail for F-150 owners.
Key Features That Stand Out
- ✓ Complete 6-cylinder ignition coil and iridium plug set.
- ✓ Explicitly designed for Turbo/EcoBoost (3-pin) engines only.
- ✓ Clear fitment notes to prevent ordering errors.
- ✓ Cost-effective way to solve drivability issues like cylinder misfires.
Why We Recommend It
We like the clarity of this kit—it tells you upfront it’s for the EcoBoost. For someone troubleshooting a persistent misfire or loss of power, replacing all coils and plugs together with a matched set is often the fastest path to a smooth-running truck.
Best For
DIY mechanics dealing with check engine lights for misfires, or those performing preventative maintenance on higher-mileage EcoBoost engines who appreciate the specific turbocharged focus.
Pros and Cons
Pros:
- Very affordable complete ignition system solution.
- Specific fitment guidance reduces the chance of buying the wrong part.
- Includes quality iridium spark plugs.
- Can dramatically improve engine performance if old parts were failing.
Cons:
- Long-term reliability of the coils is an unknown compared to OEM.
- Limited to 2011-2017 model years.
Customer Reviews
Customer Review: “I was worried about purchasing an after market product, but these coils had a great feel to them… Went in easy and works great. The cost for the whole set was cheaper than one Motorcraft coil.”
Customer Review: “Perfect fit and solved the problem. Engine was missing on two cylinders and running poorly. New plugs and coils solved it. Runs great !”
10. Set of 6 NGK Iridium IX Spark Plugs for 2011-2021 Ford F-150 3.5L EcoBoost V6
Rounding out our list is another stellar offering from NGK. This Iridium IX set boasts laser-welded precision construction and is compatible with the newest EcoBoost models up to 2021. It’s engineered to deliver maximum horsepower and torque by providing a consistent, strong spark.
Key Features That Stand Out
- ✓ Laser-welded fine-wire iridium center electrode.
- ✓ Nickel-alloy ground electrodes for durability and performance.
- ✓ Broad compatibility covering 2011 through 2021 model years.
- ✓ Designed to maximize engine output and efficiency.
Why We Recommend It
This is a top-tier performance plug from a brand synonymous with quality. If you own a newer F-150 (up to 2021) and want the assurance of NGK engineering, this is a fantastic choice. It’s built to help your EcoBoost perform at its best.
Best For
Owners of newer F-150s (up to 2021) who prioritize brand trust and engineered performance, and want a plug that supports their truck’s power potential.
Pros and Cons
Pros:
- Widest model year coverage on our list (2011-2021).
- NGK’s precision manufacturing ensures consistency.
- Engineered to support maximum engine performance.
- Excellent long-term reliability.
Cons:
- Premium pricing reflects the NGK brand and technology.
- As a high-performance plug, the benefits may be subtle in daily driving.
Customer Reviews
Customer Review: “Installed these in my 2020 F-150. The truck already ran well, but it feels even smoother now. Throttle response is crisp.”
Customer Review: “NGK never disappoints. These were the exact OEM replacement for my truck. Easy install and perfect performance.”
Complete Buying Guide for Best Spark Plugs For Ford F-150 3.5 Ecoboost
Essential Factors We Consider
Choosing the right spark plug for your 3.5 EcoBoost isn’t just about picking a brand. You need to think about the electrode material. Iridium and ruthenium plugs last longer and perform better than standard copper ones in a turbocharged engine. Heat range is critical too—it must match Ford’s specifications to prevent pre-ignition or fouling. Always, always double-check compatibility for your exact model year. A plug for a 2011 might technically fit a 2020, but engine tweaks over the years mean the recommended plug might have changed. Finally, consider if you need just plugs or a complete kit with ignition coils, especially if you’re experiencing misfires.
Budget Planning
Your budget dictates your best path. For the most cost-effective reliable fix, the budget-friendly A-Premium or Champion sets are fantastic. If you want the best balance of price and proven brand-name performance, the Champion or NGK Iridium IX plugs hit the sweet spot. For a premium, long-term investment, consider the NGK Ruthenium or a complete OEM Motorcraft set. Remember, if your coils are old, buying a coil-and-plug bundle might save money and labor in the long run compared to fixing problems separately.
Final Thoughts
Don’t overthink it, but don’t cheap out. Your EcoBoost’s performance and health depend on a good spark. Whether you go with our Best Choice Champion for value, the Editor’s Choice NGK for performance, or the genuine Motorcraft for purity, you’re making a smart move for your truck. The most important step is to just get it done—a fresh set of quality plugs is one of the simplest ways to keep your F-150 running strong for the long haul.
Frequently Asked Questions
Q: How often should I change the spark plugs in my Ford F-150 3.5 EcoBoost?
A: Ford typically recommends a change interval between 60,000 to 100,000 miles for the EcoBoost with iridium plugs. However, if you do a lot of towing, idling, or short trips, checking them at the lower end of that range is wise. Listen for misfires, rough idle, or loss of power—these are signs it’s time for a change.
Q: Can I use cheaper copper spark plugs in my EcoBoost?
A: It’s not recommended. The 3.5L EcoBoost is a high-performance, direct-injection, turbocharged engine that runs at higher pressures and temperatures. Iridium or ruthenium plugs are designed to handle this heat and last much longer. Copper plugs would wear out very quickly and could lead to performance issues.
Q: Do I need to gap the spark plugs before installing them?
A> Most premium iridium plugs come pre-gapped from the factory. However, it is always a good practice to check the gap with a feeler gauge before installation. Shipping can sometimes affect them. The correct gap for most 3.5L EcoBoost engines is 0.028-0.031 inches. Refer to your owner’s manual for the exact specification.
Q: What’s the difference between Iridium and Double Iridium plugs?
A> Standard iridium plugs have an iridium tip on the center electrode. Double iridium plugs have iridium tips on both the center and ground electrodes. This further reduces wear on both sides of the spark gap, potentially offering even longer service life and more consistent performance over time.
Q: Should I replace the ignition coils when I change the spark plugs?
A> It’s not always necessary, but it’s often a good idea, especially on higher-mileage trucks (over 100,000 miles). Coils wear out too. Since you’re already doing the labor to access the plugs, replacing both the coils and plugs together ensures your entire ignition system is fresh and can prevent a future coil failure that would require you to repeat the job.
Maintaining your Ford F-150 3.5 EcoBoost doesn’t have to be complicated. Investing in a quality set of spark plugs is one of the most effective ways to ensure reliable starts, smooth power, and good fuel economy. Whether you prioritized our top-rated Champion set, the performance-focused NGK, or the OEM-correct Motorcraft, you’ve taken a key step in caring for your truck. Ready to feel the difference? Click on any of the links above to check the latest prices and get your new spark plugs on the way. Your EcoBoost will thank you with every mile.
