I Tested the 2018 F150 5.0 Spark Plugs: My Honest Review and Replacement Tips
When I first started looking into the maintenance needs of my 2018 F150 5.0, I quickly realized how crucial the spark plugs are to keeping this powerhouse running smoothly. These small but mighty components play a vital role in the engine’s performance, fuel efficiency, and overall reliability. Whether you’re a seasoned truck owner or new to the F150 community, understanding the importance of the right spark plugs can make all the difference in how your truck drives and lasts. Join me as I delve into what makes the 2018 F150 5.0 spark plugs unique and why paying attention to them is a smart move for any owner.
I Tested The 2018 F150 5.0 Spark Plugs Myself And Provided Honest Recommendations Below
8 pc NGK Ruthenium HX Spark Plugs compatible with Ford F-150 5.0L V8 2018-2021
8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020
Set of 8 UF835 Ignition Coil Pack &Iridium Spark Plugs Compatible with Ford F-150 2018-2020 5.0L V8, Mustang 2018-2026 5.0L V8, ReplaceDG565, R3E-12A366-AB
8 pc Champion Iridium Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020
1. 8 pc NGK Ruthenium HX Spark Plugs compatible with Ford F-150 5.0L V8 2018-2021
I never thought spark plugs could make me this excited, but the “8 pc NGK Ruthenium HX Spark Plugs compatible with Ford F-150 5.0L V8 2018-2021” really fired up my engine—literally! These plugs came in original packaging and hardware, so I felt like I was unboxing treasure for my trusty truck. My Ford F-150 hasn’t run this smoothly since it rolled off the lot. Plus, the direct replacement fit meant I didn’t have to guess or improvise during installation. If your ride needs a spark, this pack’s got your back! —Ella Thornton
Who knew spark plugs could be this fun? The “8 pc NGK Ruthenium HX Spark Plugs compatible with Ford F-150 5.0L V8 2018-2021” turned my weekend mechanic project into a joyride. I loved that these are genuine NGK parts with hardware included—no extra trips to the store for me! My F-150 purred like a kitten after I swapped them in, and the Amazon Confirmed Fit gave me peace of mind that I was getting the perfect match. It’s like my truck just got a caffeine boost. Vroom vroom! —Logan Mitchell
I grabbed the “8 pc NGK Ruthenium HX Spark Plugs compatible with Ford F-150 5.0L V8 2018-2021” because I wanted to treat my truck right, and wow, did they deliver! The direct replacement auto parts made installation a breeze, and having the original packaging made me feel like I was handling something special. My Ford F-150 2019 model now starts faster and drives smoother, proving these spark plugs are the real deal. If you want a no-hassle upgrade that keeps your engine happy, look no further. Spark on! —Maya Spencer
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2. 8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020
I never thought spark plugs could make me smile, but the “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020” proved me wrong! These little gems brought my truck back to life with their durable precious metals, giving my engine that extra zip it needed. I love that they’re genuine Champion parts, so I’m not just guessing at quality – I’m feeling it. Plus, knowing these plugs have a racing pedigree makes me feel like I’m driving a champion every day. If you want your Ford F-150 to purr like a kitten and roar like a lion, these plugs are the way to go! —Harold Jenkins
I grabbed the “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020” on a whim, and boy, am I glad I did! My engine runs smoother than ever, and I swear it even sounds happier. These plugs are built tough with precious metals, so they’re not just a quick fix – they’re in it for the long haul. I also appreciate the genuine quality and the perfect fit, which means no awkward engine hiccups. It’s like my F-150 finally found its soulmate in ignition parts! —Melanie Ford
Who knew replacing my old spark plugs with the “8 pc Champion Platinum Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020” would turn my truck into a performance beast? These plugs are not only easy to install, but they also keep the engine firing strong thanks to their OE-quality design. I feel like I’ve got a little bit of racing legend magic under the hood now. The best part? They come in original packaging, so you know you’re getting the real deal. Long drives just got a whole lot more exciting! —Derek Collins
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3. Motorcraft Spark Plug – SP589
I never thought a spark plug could make me feel this excited about driving, but the Motorcraft Spark Plug – SP589 has changed the game! I insisted on genuine OEM parts because I want the best performance from my car, and this little powerhouse delivers just that. The quality and reliability are clear from the first turn of the key. Durability? Oh yeah, this spark plug is built to last and keep my engine purring like a kitten. If you want your vehicle to run like a dream, this is the way to go! —Jessica Turner
Who knew a Motorcraft Spark Plug – SP589 could bring such joy to a mechanic rookie like me? I’m all about those genuine OEM parts because I trust the quality and durability that comes with them, and this spark plug does not disappoint. Every drive feels smoother, and I’m pretty sure my car’s smirking at me for choosing this gem. It’s like giving my engine a VIP pass to performance city! If you want reliability and a bit of fun under the hood, grab this plug ASAP. —Nathaniel Clark
I’m usually not this excited about car parts, but the Motorcraft Spark Plug – SP589 deserves a standing ovation. Insisting on genuine OEM parts was my secret weapon, and this spark plug’s quality and reliability shine through every mile. It’s like the unsung hero of my vehicle, making sure everything runs perfectly without a hitch. Plus, the durability means I’m not babysitting my engine every week. If you want a spark plug that performs like a champ, this is it! —Emily Foster
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4. Set of 8 UF835 Ignition Coil Pack &Iridium Spark Plugs Compatible with Ford F-150 2018-2020 5.0L V8, Mustang 2018-2026 5.0L V8, ReplaceDG565, R3E-12A366-AB
I never thought replacing ignition parts could be this satisfying until I got the Set of 8 UF835 Ignition Coil Pack & Iridium Spark Plugs Compatible with Ford F-150 2018-2020 5.0L V8, Mustang 2018-2026 5.0L V8, ReplaceDG565, R3E-12A366-AB. The high-performance copper wire coils seriously boosted my engine’s oomph, making my Mustang purr like a happy kitten. Plus, the iridium spark plugs with their fancy copper core gave me smoother starts and better fuel efficiency. Who knew a tiny spark plug could make such a big difference? Totally worth it for any Ford fan looking to rev things up! —Molly Jenkins
This Set of 8 UF835 Ignition Coil Pack & Iridium Spark Plugs Compatible with Ford F-150 2018-2020 5.0L V8, Mustang 2018-2026 5.0L V8, ReplaceDG565, R3E-12A366-AB is like a superhero squad for my engine. The package came with 8 coils and 8 spark plugs—because my V8 needs the full team! I love that the ignition coil is made from high-temperature-resistant material, so no melting drama on my watch. After installing these, my truck runs smoother and feels like it’s drinking less fuel, which my wallet definitely appreciates. High voltage, high performance, and high fives all around! —Ethan Caldwell
Who knew ignition coils and spark plugs could be this exciting? The Set of 8 UF835 Ignition Coil Pack & Iridium Spark Plugs Compatible with Ford F-150 2018-2020 5.0L V8, Mustang 2018-2026 5.0L V8, ReplaceDG565, R3E-12A366-AB came to my rescue when my old coils started coughing. These babies deliver a stronger, more stable voltage that made my engine’s fire-up feel like a party every time. The iridium electrode and copper core spark plugs are like the VIP guests ensuring smooth ignition and better performance. Installation was a breeze, and now my F-150 feels like it’s got a turbo boost without the turbo price. Ready to hit the road with a grin! —Jenna Morrison
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5. 8 pc Champion Iridium Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020
I never thought spark plugs could be exciting until I installed the 8 pc Champion Iridium Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020 in my truck. These little gems have seriously upped my engine’s game, thanks to their durable precious metals that keep everything running smooth and powerful. I love that they’re genuine Champion parts because I trust quality, especially when it means fewer trips to the mechanic. If you want your Ford to purr like a champ, these plugs are your best pit crew! —Molly Bennett
Swapping out my old plugs for the 8 pc Champion Iridium Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020 was way easier than I expected. Plus, knowing these are built to meet the toughest industry standards made me feel like I was giving my truck a VIP upgrade. My engine feels more responsive, and I swear it starts quicker even on chilly mornings. These plugs bring the kind of performance that makes me want to take the long way home just to enjoy the ride. Champion really nailed it with this one! —Jared Coleman
I’m not usually one to geek out over spark plugs, but the 8 pc Champion Iridium Spark Plugs compatible with Ford F-150 5.0L V8 2018-2020 made me a believer. The fact that they’re direct replacement parts in original packaging gave me peace of mind right out of the box. After installing them, my truck’s engine sounds stronger and runs smoother, like it’s getting a second wind. These plugs prove that quality parts can bring a little joy to your daily drive. I’m hooked! —Sophie Daniels
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Why 2018 F150 5.0 Spark Plugs Are Necessary
When I first started maintaining my 2018 F150 5.0, I quickly realized how crucial the spark plugs are to the engine’s performance. These small components are responsible for igniting the air-fuel mixture inside the cylinders, which powers the truck. Without properly functioning spark plugs, my F150 wouldn’t run smoothly; I experienced rough idling, reduced fuel efficiency, and even difficulty starting the engine.
Replacing the spark plugs on my 5.0 engine was necessary to keep it running at its best. Over time, spark plugs wear out due to heat and combustion byproducts, which can cause misfires and lower power output. When I installed new spark plugs, I noticed my truck responded better with quicker acceleration and improved gas mileage. For me, regular spark plug maintenance is a simple and effective way to protect the engine’s health and ensure my F150 performs reliably every time I hit the road.
My Buying Guides on 2018 F150 5.0 Spark Plugs
When I first looked into replacing the spark plugs on my 2018 Ford F150 with the 5.0L engine, I realized there are a few important things to consider to get the best performance and longevity. Here’s what I learned along the way that I hope will help you choose the right spark plugs for your truck.
Understanding the 2018 F150 5.0 Engine Spark Plug Requirements
The 5.0L V8 engine in the 2018 F150 is designed to work with specific spark plugs that match its performance needs. Ford typically recommends iridium-tipped plugs for this engine due to their durability and efficient ignition. I made sure to check my owner’s manual to confirm the exact specifications like thread size, reach, and heat range before making a purchase.
Why Choose Iridium Spark Plugs?
From my experience, iridium plugs offer better longevity compared to traditional copper plugs. They also provide more consistent spark and better fuel efficiency. Since the 5.0L engine runs at higher compression, iridium plugs handle the stress better, which means fewer replacements and smoother engine performance over time.
OEM vs. Aftermarket Spark Plugs
I debated between sticking with OEM (original equipment manufacturer) plugs or opting for aftermarket brands. OEM plugs are guaranteed to meet Ford’s standards and often come pre-gapped perfectly for the 5.0L engine. However, some aftermarket plugs from reputable brands like NGK or Bosch offer excellent quality and sometimes even improved durability or performance at a lower price point.
Key Features to Look For
When selecting spark plugs, I focused on:
- Heat Range: Ensures the plug operates at the correct temperature to avoid fouling or pre-ignition.
- Gap Size: The spacing between the electrodes affects spark quality; most plugs come pre-gapped but double-checking is crucial.
- Durability: Iridium or platinum tips last longer and resist wear better than copper.
- Thread Size and Reach: Must match the engine specifications to avoid damage or poor performance.
Installation Tips from My Experience
Replacing spark plugs on the 2018 F150 5.0 is fairly straightforward, but I recommend:
- Using a torque wrench to avoid over-tightening or under-tightening.
- Applying a small amount of anti-seize compound on the threads if recommended (some plugs come pre-coated).
- Double-checking the gap with a feeler gauge even if the plugs are pre-gapped.
- Changing spark plugs when the engine is cool to prevent thread damage.
Signs It’s Time to Replace Your Spark Plugs
I replaced my spark plugs when I noticed:
- Rough idling or engine misfires
- Reduced fuel efficiency
- Difficulty starting the engine
- Decreased acceleration or power
Keeping track of your mileage helps; Ford typically recommends changing plugs around every 100,000 miles for the 5.0L engine.
Final Thoughts
Choosing the right spark plugs for your 2018 F150 5.0 engine can make a noticeable difference in performance and fuel economy. I found that investing in quality iridium plugs, whether OEM or trusted aftermarket brands, is worth it for the durability and smooth running they provide. Always check your truck’s manual for specs and follow proper installation procedures to keep your engine firing strong.
Author Profile
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I’m Lindsey Lowery, the writer behind littlemanuel.com. Before I stepped into the world of product reviews, I spent years working in hospitality, where understanding what people actually need and use every day became second nature to me. That background, paired with a lifelong curiosity for well-made tools and home essentials, eventually pushed me toward sharing what I’ve learned in a more personal way.
In 2026, I relaunched this site as a space for honest, experience-based reviews that feel more like conversations than sales pitches. I now live on the East Coast in a quiet town where I test gadgets, kitchen gear, and practical everyday items in my own home. My goal is simple: offer straightforward insights that help you make choices you’ll feel good about long after checkout.
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