Because it is made of iridium, frequent spark plug changes are not required. Popular For You: 9 Best Windshield Covers For Snow and Ice To Buy Online. While scouting online for the best spark plugs for F150 Ecoboost, I saw these Motorcraft SP-432 Spark Plugs. Materials may dictate changing more or less frequently but--- for cars this old that's not the worst thing about parts availability. David. When the time came to replace the depleted spark plugs of my 3.5L F150, I opted for SP-534/SP-580. Sometimes, finding the best spark plugs for 3.5 EcoBoost is vital. The iridium tip located in the electrode is used to give maximum power to the motor, giving you an instant start in a single stroke. I put in NGK Iridiums, 1 step colder, gapped at 0.034, truck ran like SHHTTTT worse mileage, poor acceleration. Start on the passenger side first and unplug the ignition coils by taking the red tab and slide it back. What I researched and found there are two options from Motorcraft. Continuing to drive with worn-out spark plugs can adversely affect Ecoboost performance. Available for most vehicle makes and models,Motorcraft Spark Plugs, are tested to Ford specifications for performance and emission standards.However, many N-owners prefer the hotter burning . If the plugs are far out of gap it is best to just go return them and exchange them for properly gapped ones. Therefore its essential to check out recommended miles when choosing new ones so that they dont need replacing more often. If you have spark plug problems, look for replacements from popular brands such as NGK, DENSO, Motorcraft, Autolite or ACDelco. When spark plugs begin to wear out, your engine can misfire, stall and have trouble starting. With light modification I would open the gap on them to .055 using actual feeler gauges or the spark gap tool that has wire loops and that would give better spark performance. But the NKG 6509 is built with an iridium body and electrode pin that offers promising performance. the one thing you need to like for sure know know about plugs. Your email address will not be published. You cannot change the space specification. Then you have a quality guarantee. Motorcraft Spark Plug SP-534/SP-580 Boost the Ecoboost engine to perform as if its brand new. EcoBoost Engine Upgrades: 12: Aug 19, 2022: E: What are the gaps for Tune+ NGK 1 step colder? to Amazon, eBay and other sites may include affiliate code. Lastly, different types of material are utilized in the electrodes of the plugs, buy spark plugs with the finest configured electrodes. Also, I have tried the LTR7IX-11s which I think felt good. ACDelco Spark Plugs provide smooth engine performance and high idle stability for the vehicle. However, gapping vary depending on your vehicle model. You should generally change your f150 spark plugs according to the frequency listed in your cars owners manual, which is typically around 30,000 miles. Its designed and built to handle the harshest environments while giving you a comfortable ride. SteveF March 10, 2008, 8:36pm #5. I have heard of only one spark plug problem on an ecoboost, but it was on a ram forum. The Motorcraft SP-550 spark plug is a genuine Ford part that offers excellent value for money. Good running conditions: If everything is good, the spark plug should have a tan/light brown color. Whether you drive a Ford F150 or other heavy-duty vehicle, Motorcraft can make your commute so much smoother and more comfortable. To find your engine's spark plug gap setting, check your Owner's Manual under the "Capacities and Specifications" section. The consent submitted will only be used for data processing originating from this website. It is a no stress type bolt that isnt having to work very hard. In this respect, the iridium material of the NGK 6509 spark plug ensures high-level performance and unmatched endurance. The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes. I really like magnetic spark plug sockets as they do the best job in 2021. the original spark plug does not have anything on the threads no anti-seize. In this respect, iridium spark plugs are more suitable than platinum plugs owing to iridiums higher melting point. Jegs coils provide great value with an increase in performance over stock coils. Before coming to market, all NGK spark plugs must pass extensive testing and quality checks, including acceleration, combustions, mechanical vibration and thermal shock tests. Motorcraft Vs NGK spark plugs: Major differences These two spark plugs differ in their design and few feature, we are going to break them down for your convenience: NGK plugs have trivalent plating and anti-seizing lubricant. Knowing the right spark plug gap is important for vehicle maintenance. Along with all the other essential features, you should also opt for this facility. It generates the electrical current necessary to ignite the air-fuel mixture compressed in the combustion chamber. In addition, it also gives you smoother acceleration and idling, resulting in a faster flame spread and generating power to run your car. I'm Max and this is my spot to geek out about car repair. But plugs that have a thread size of around 14mm are great for an f150 Ecoboost as well as the other Mazda models. Commercial spark plugs range from $2.5 to $15. The product is guaranteed to boost vehicle performance and MPG. That would be for very aggressive driving habits and if you are constantly racing your truck or pushing it hard on off-road etc. Price: $25. nickel. get the cheaper. You will need various extensions, ratchets, and metric and SAE sockets. And keep the engine in perfect condition after driving thousands of miles with brakes. In order to be able to correctly check the gap of these plugs make sure you buy some high quality feeler gauges and know how to use them properly. It depends on the material used in the spark plug. One of the most common problems with spark plugs is that they break easily. Most power outlets are reasonably well constructed and safe. What Tools Do I Need To Change Plugs Ecoboost? You may need to use a little pocket screwdriver or pick to help you get the connectors off. Not to mention the quick installation and easy replacement is also its plus point. SimplePortal 2.3.5 2008-2012, SimplePortal, Powered by SMFPacks Advanced Attachments Uploader Mod. Motorcraft is a well-known and recommended brand for manufacturing spark plugs for the F150 Ecoboost. I hope you enjoy the site and reach out if you'd like to be interviewed. Motorcrafts multi-rib insulator protects the engine from misfiring. These plugs are highly adaptable and can be used on bone-stock trucks and even aggressively tuned and heavily modified EcoBoost F150s when gapped down. Re: P0016 code, But cam positions in range. Replacement is recommended as dirty spark plugs cause misfiring. Pretty sure these have a heat range of "8". Rough idle/"shudder" -> regapped stock plugs to 0.035. For a better experience, please enable JavaScript in your browser before proceeding. Lift the cover upwards and then pull the cover forward towards you. You will find information in the owners manual on when to replace your existing spark plugs with new ones. Don't risk the warranty crap and possibility of bad advice from a mechanic on new plugs. 2.) Not much details available for those plugs and not sure if they're better than the NGK 95605 Ruthenium HX Good enough for the worlds fastest edge good enough for mine! First thing first, I guess the plugs withstood approximately 70-80k miles. This spark plug will fit various other models and engines with the correct spacing. They will foul easier and need to be replaced sooner than the former plug, so the slight increase in spark performance and life expectancy should be weighed in your choice. It might also be important to note that people might enjoy driving this engine and truck harder than normal, and therefore might be putting more stress on the spark plugs. Spark plugs from Motorcraft are not observed to provide torque. Motorcrafts spark plugs are resistant to oxidation and NGKs plugs are resistant to carbon deposit. Save my name, email, and website in this browser for the next time I comment. Just wondering if there is actually a difference between the two. Iridiums will last longer, but you won't get any mileage increase. Be careful with the tip of these plugs as they are very fragile and can break easily. Ensuring the compatibility of the new plugs allows owners to install them quickly and thereby guarantee excellent performance. They partially burn engine oil, preventing the plugs from creating sparks required for igniting the fuel after going inside the cylinder. If your engine bay is dirty spray compressed air around each of the coils and remember being clean is always better. However, there are often no symptoms until one of the old spark plugs fails, causing the engine to misfire. E3 spark plugs are known to improve fuel efficiency and give trucks better performance. Both can cause an engine to stop or slow down erratically. What you might start to notice in your ecoboost 3.5l if the plugs need to be changed is the car shaking at idle or missing. This overheating can cause the spark plug electrode to wear faster. "M" 2013 SHO PP | AJPTurbo E30 Tune | FS HPFP | Stock IC with Ice Water DIY Sprayer | PPE Downpipes | Custom Magnaflow Resonator | 3rd Cat Delete | Derale Upgraded Trans Cooler | Dicunzolo Gen2 Trans Mounts| EPP Noisemaker Eliminator | MSD Coil Over Plugs | SP-542's | UPR Dual Valve Catch Can | K&N Drop In | Power Stop Slotted and Drilled Rotors with Stock PP Pads | H&R Springs | AVS Flush Deflector | 802SHO Custom Splitter | Duraflex Chin Spoiler | Curva Concept C7's | Continental DWS06 Extreme Contact Rubber | 411 HP and 546 TQ |. Whereas, Motorcraft do not have trivalent plating. And above all, cheap copper connectors face overheating problems. But if you follow an accurate guide with reviews of the current best options, you will surely get something better. The most important ones you will need are a 5/8 spark plug socket and an 8mm socket to remove the ignition coil bolts. Are you looking for the best cheap F150 Ecoboost spark plug to reinstate your trucks original performance? E3 Spark Plugs E3.74 1 Pc Automotive Spark Plug, 3. Copper plugs are for higher power builds that run forced induction. Luckily they are not very difficult to change, with some basic knowledge and tools you can do it yourself. I would say they are probably the same spark plug with just an revised part number (supercession) considering they are both Iridium! The recommended gap for a spark plug is not a precise figure, but simply the midpoint of a preferred range. NGK Iridium IX spark plugs were designed specifically for the performance enthusiast. The E3 spark plug has perfect gap ratios to achieve maximum power output. F150 owners looking to replace the old factory spark plugs with affordable OEM-grade parts without affecting performance should choose SP-432. You should consider buying manufacturer-recommended spark plugs and heat range for best results. A $3 spark plug is the best option for race cars that require high power output in a short time. Whereas, Motorcraft do not have trivalent plating. 1.) The most demanding feature is the ease of installation, saving truck owners time and money. Moving forward I wont drop as much $$ into a full ngk setup, however I wonder why they shortened that particular AGSP32PP plug. Livernois Catless downpipes with Totalflow mufflers - AJP E40/Meth tune - Firestorm HPFP - DW 300 LPFP - Kenne Bell Boost-a-Pump - 3 Bar Map - Alky Controls Meth Injection - 160 Thermostat - EPP Hot Pipes - AEM Dryflow Filter - BOV VTA - SSM Polyurethane Torque Struts - H&R Sport Springs - 20"x10" Niche Veronas on 275/40-20 DWS06 -. This full set of six iridium spark plugs from NGK are an excellent choice for tuned vehicles that have wore out the welcome of the factory plugs. Motorcraft spark plugs will be the maximum fit, if you have or buy Ford, Lincoln, or Mercury cars. The fundamental features and noble quality made it sell like hotcakes, especially in India. Ford introduced Motorcraft in the 1950s however, they temporarily discontinued the production. Once supply dried up and oem reference pointed to a taller plug is when people really noticed as a large group. If the cooling system is not working properly, it can cause the engine and spark plugs to overheat. Furthermore, this E3 spark plug has been designed innovatively to minimize harmful emissions. After inspecting the SP-432 Spark Plug from Motorcraft, I realized that the part perfectly matched the OEM spark plug specifications. Best Tuner For 6.0 Powerstroke: Top 5 Choices 2022 [Review & Buying Guide]. Read more: F150 Phone Mount: 5 Best Choices For Your Truck. In this video, Makuloco is diagnosing a misfire on a 2007 Ford F-150 when he discovers that a loose spark plug is the culprit. In other words, your plugs are currently correctly gapped. With good quality spark plugs in your vehicle, it can achieve the best fuel economy and performance possible. Ignition Coils Used in Electronic Ignition Systems The design of this. 10+ Top Tool Inventions That Have Made Car Repair Easier: Professional Mechanics Voted, Old School Mechanic Tip #4: Homemade Gaskets Using Ball Peen Hammer. Motorcraft - SP-433 - Spark Plug Part number: SP-433 Fit type: Vehicle Specific Package Dimensions: 3.048 H x 13.208 L x 3.302 W (centimeters) Following replacement, I was simply amazed by the improvement in the performance of my F150; it almost restored the original ride quality. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. In 1972 Ford relaunched this division to manufacture replacement parts and original equipment parts. They come pre-gapped but check your owner's manual to confirm correct gap. The most sophisticated and technologically advanced options typically cost around $10 or more. Multipurpose, nice! NGK vs Bosch Spark Plugs. Additional Information Best Spark Plugs for Ford Ecoboost 3.5l Engine: Why do Ford Ecoboost Engines Need New Spark Plugs So Often? original spec plugs, you are experimenting on your own. We discovered almost all Ford F150 owners participating in these forums decided to stick with OEM products about replacing depleted spark plugs. They are well-known for selling high-quality spark plugs that operate even in the most adverse situations. Manage Settings Pull the coil out and twist as you pull up to break the seal from the boot on the spark plug. I strongly recommend this especially for vehicle owners who want a 3.5 Ecoboost spark plug upgrade. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'autoactuality_com-medrectangle-1','ezslot_2',110,'0','0'])};__ez_fad_position('div-gpt-ad-autoactuality_com-medrectangle-1-0');report this ad, Location: 61 Clinton St, Brooklyn NY 11201 USA. With anything please be careful of not breaking the porcelain on the plugs, not dropping them down into the spark plug hole, and not letting dirt, debris, or bolts fall down into the cylinder. I would recommend doing them every 50,000 miles based on my reading of forum users and because they are relatively easy to change. Your email address will not be published. Its center electrode is iridium, which makes it incredibly durable. Dunno! The trivalent metal plating imparts anti-seizing properties to the plug and makes it amazingly resistant to corrosion. This NGK 6509 spark plug LTR6IX -11 is much more affordable than platinum spark plugs yet rivals them in performance. Just a few years ago, single-layer connectors were famous because they were cheaper and easier to install. Aside from durability, it also offers faster ignition compared to other spark plugs. It is designed in a specific way that meets all your needs for form, function, and fit. If you click them and make a purchase, we may earn a small commission. Dunno! Another option from Motorcraft as the best spark plugs for a 2016 F150 Ecoboost is this model. NGK patented this design and recommends it for turbo and supercharged engines - a perfect fit for the EcoBoost engine. Required fields are marked *. Unlike platinum or nickel-alloy spark plugs, this iridium spark plug creates intense sparks even in freezing weather. A spark plug plays the most important role in your vehicles engine, its properties provide energy to drive your cars engine. The "best" plug for the 4.0L OHV seems to be the Motorcraft Platinum. In addition, it offers a perfect balance between performance and fuel efficiency. Yes, it helps fix misfiring and is easy to remove from engines. Agradetools.com is compensated for referring traffic and business to these companies. Q: Which is better; platinum or iridium spark plugs? How to Easily Pick and Use an OBD Scanner Like a Pro? Report abuse. It is important to consider the dimension of a spark plug as an incorrect and different sized spark may not fit into the sockets and in this case, could also cause a short. The USP of this spark plug is the proprietary DiamondFire electrode technology it exploits for creating intensely powerful sparks. Chrome exterior for better electrical conductivity, Very effective in fixing misfire and rough idle, Drop-in replacement for worn-out old OEM spark plugs, Comes pre-gapped; hence some will find the gap not customizable. You can't gap Iridium plugs. Lower numbers imply hotter spark plugs, while higher numbers suggest colder spark plugs, according to the NGK heat conversion table. These, like our other examples, provide gains in fuel economy, performance, and throttle response. Multi-coating greatly reduces the misfire rate. Not only that, the engine response is excellent. That's a simple enough fix, but the owner of the pickup recently replaced the coils and spark plugs in the truck as it hit 130,000 miles with no success. The Bosch 9616 Double Iridium is built and engineered to provide a comfortable driving experience at all times. If you are looking for the best spark plugs for f150 EcoBoost that will work over a long period and improve the overall performance of your vehicle, this is the one for you. These spark plugs provide the same or better performance than your truck did when it was new. Furthermore, it is designed and focused on extreme durability and strict standards. The last time the actual spark plug was replaced was many years ago from the Motorcraft SP-528 which were Platinum to the SP-534 Iridium plugs! This standard heat range spark plug serves as the ideal replacement for the stock part in many Ford vehicles, including F150. Finding a good heavy-duty spark plug can seem a bit confusing. Better yet, they can not only replace the coil-on-plug ignition system that is found in new vehicles but can also replace the old distributor-equipped system found in cars. Yes, replacing spark plugs is a job that can be done easily and inexpensively in the comfort of your own home. Read my article about Mode 6 data here. How often should I change the plugs on my 3.5l Ecoboost Ford? If you want to purchase a new spark plug for your F150 Ecoboost, read the comprehensive reviews below. It is sturdy built, capable of withstanding rough usage, and resistant to abrasion and attrition. Ford Ecoboost engines are well known in the automotive world for their great towing and hauling capacity. If you start to notice misfiring, check engine code, a flashing check engine light, a hiccuping in the truck, a loss of MPG or performance, it might be time to at least check the gap on the plugs and make sure none of them have cracked porcelain or other problems. Coils: NGK vs Motorcraft vs ? With first-class materials, these spark plugs will provide you with the best service for a long time. Ive read through thousands of customer reviews and most of them applaud these spark plugs for their excellent price. But the only reason they die so quickly is from overheating. Performance Upgrades - Gen 1 (89-91) Gen 2 (92-95) Engine, Intake, Exhaust and Drive Line NGK vs Motorcraft Samtheman94 Jan 2, 2022 Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Popular For You: 9 Best Brake Pads For Honda Accord Review To Buy Online. This type has one ignition coil per spark plug. Gasket seat is NGKs feature, on the other hand, Motorcrafts plug includes a Conical seat. $13. In addition, the function also creates a strong obstacle to core fitness. Remove the 8mm (eight millimeter bolt) holding down the ignition coil to the valve cover. ENA Set of 8 Platinum Spark Plugs Compatible with F-150 5.4L, 4. It improves the overall performance of your truck by making it run more efficiently. These are copper core spark plugs and use new ceramic technology. Motorcraft or Autolite platinum plugs are perfect for bolt-on Zetecs. Popular For You: Discover The Best 3-4 Ton Truck Tires On The Market Right Now For Maximum Durability. Spark plugs from Motorcraft are not observed to provide torque. However, its efficiency decreases steadily as different engine parts undergo gradual wear and tear, including spark plugs. Motorcraft SP542. Ford Motor Company's top-quality spark plugs Fit most automotive and many specialty applications Help improve performance and resist erosion Available as replacement spark plugs for older model-year vehicles Designated by the letters "F" or "FE" in the part number suffix on plug body and box MOTORCRAFT WARRANTY A Warranty as strong as our parts AS long as the gap is right and wire routing is good you should be fine. NGK 6509 Iridium Spark Plug LTR6IX-11 (6Pcs). Motorcraft produces oil filters as well and the filters fit into a variety of applications. The torque spec on this bolt is not super important, just get it moderately tight (do not break it) and youre good. Lets explore! Do not fight them and try not to break them. Q: What is the spark plug gap on a 3.5 Ecoboost? It might also be important to realize these engines are turbo charged which can lead to faster spark plug degradation. Old School Mechanic Tip #2: Which Way Does The Thermostat Go? Truck Caps: Who Wins The Debate? Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. There are some differences, but they will all do a good job. 2. I recommend going for spark plugs that are produced from iridium or platinum. Learn how your comment data is processed. If theres a mismatch between the stock spark plugs and the replacements, youll have to adjust the gap. Thanks for the info guys, I really appreciate it. Show more Specifications 6. Guides and Reviews Written for the DIYer / Technician. Spark plugs have an inexpensive copper core at one end. Type C consists of the two round poles that enter into two holes, while Type E has an additional smaller pin up the top. Inductance: 1.5 mH. Ford says every 100,000 miles for normal interval or every 60,000 for special functions. Put the coil back on the cylinder and re-tighten the 8mm fastener holding the ignition coil to the valve cover. Spark plugs are essential for our cars. Motorcraft is the highest quality spark plug for f150 EcoBoost available on the market. Spark plugs are an important component for any vehicle as they improve combustion and fuel economy. Motorcraft SP-432 Spark Plug Last exceptionally more than 60,000 miles. Pro Tip: It helps to push the connector all the way in towards the coil and then push the tab down and then pull it off. I just figure since the rest of my engine is stock, I am sticking to Motorcraft., Extremely resistant to corrosion and wear-and-tear, Optimizes emissions curtail fuel consumption, and minimizes misfires. Overheating is the most common cause of dead spark plugs. The spark plug takes a beating with rough use, especially on the F150. Do not attempt to gap spark plugs without watching many videos and feeling confident in your ability. 1 6 Best Spark Plugs for F150 Ecoboost - Recommended by Henry Ford150 1.1 Motorcraft Spark Plug SP-534/SP-580 - Best Overall 1.2 Motorcraft SP-432 Spark Plug - BEST OEM 1.3 Motorcraft Spark Plug SP550 - Best Budget 1.4 NGK 6509 Iridium Spark Plug LTR6IX-11 (6Pcs) - Best Aftermarket 1.5 NGK 6510 LTR7IX-11 Iridium IX Spark Plug (4Pcs) PART NUMBER: M-12405-35T The web site says they're not for the Edge, but are correct for the F-150 without detailing which F-150 engine. Old School Mechanic Trick #6: No Magnetic Socket, No Worries! So, if you own a modified F-150, lets take a look at the above five choices in the list, I put the e3s in after 140K on the stock ones, although that was only last week i can already tell by my trip meter the mileage has gone up, not much. Just want to remind you this then well finish the guide: Before selecting a particular product, its crucial to ensure that it is compatible with your specific F150 pickup model. E3 Spark Plug E3.74 Automotive Spark Plug. Its engine requires the best spark plugs for f150 EcoBoost for easy starting and flawless driving on the road. The amount of platinum is 2 to 3 times better than the single platinum plug. *You must use extreme caution when it comes to heat range. Ford F250 Catalytic Converter Scrap Price: How Valuable Is It? You can do things for yourself. For the OE Iridium series, dual precious metal means iridium on the center tip and platinum on the ground electrode. Pull the existing plugs, You should be using a real spark plug socket when working with spark plugs. Repeat the same process removing anything that is in your way to reach the 8mm bolt holding down the coils. ngk 58976. motorcraft sp534 spark plug. Therefore, it is necessary to ensure the good condition of the spark plugs. It has been designed and engineered stringently to perform like factory originals, ensuring robust performance and lasting reliability. Save my name, email, and website in this browser for the next time I comment. if they are made from the same materials, with the same gap and one is cheaper. Started by wildbadger47; Dec 27, 2021; Replies: 0; For Sale. The NGK Iridium IX plugs are high quality iridium spark plugs made for the auto enthusiast who demands better performance. Having said that- I would personally not use Champion (maybe in a lawn mower) but the NGK or Denso are outstanding plugs, at least in foreign cars. I have the new SP580 plugs arriving tomorrow. Why? Brisk spark plugs rival those of NGK and offer great gains in off idle throttle response as well and come in at right around $80. The result is a more complete burn, resulting in more power and better consistency. NGK plugs can provide torque. I have found they work the best and last the longest regardless of make and model of vehicle., Heat range specified by the manufacturer: 7, Copper core facilitates heat elimination. An easy-to-install spark plug helps you replace or clean it whenever you want. A variety of extensions and having metric sockets in both 3/8 drive and 1/4 drive make doing these jobs easier as you can choose which size socket to use based on how much space you have. Inspecting for any damage is also very easy. Both sets of plugs run way better than the OEM plugs. They go a long way in helping the f150s haul loads and haul heavy stuff. This special spark plug has been developed to produce clean and intense combustion. I mean I love oem double platinum but those are hard to find. After testing these spark plugs rigorously, we concluded that this is simply the most performance-oriented and durable aftermarket spark plug. Also, it offers top-notch safety precautions while using it. Any dirt or debris in the spark plug gaps will flow into the Ecoboosts internal combustion chamber. This product has the amazing build quality and will give you the ride you deserve. Re: 2013 SHO w/pp. I live in Colorado as well. Experts recognize how effective multiple shifts can be. With these, you dont have to worry about wear and tear or leaks. Your email address will not be published. JavaScript is disabled. Motorcraft and NGK both are the kings of spark plugs in the automotive market. Hex Size (in): 5/8 Inch. How To Choose The Right ASME Block For Your Project? (Part number SP- 534 has been superseded by Part number SP-580) 6 Best F150 Leveling Kits 2022 [Review & Buying Guide], F150 Phone Mount: 5 Best Choices For Your Truck, 8 Best Tonneau Covers For F-150 2022 [Review & Buying Guide], 5 Best Oils for 3.5 EcoBoost 2022 [Review & Buying Guide], Ford F150 Triton 5.4 P0340 Fault Code: Diagnosis & Repair. Spark plugs with the wrong gap can cause the engine to jump or run erratically, especially at idle. Specially designed for Ford vehicles, the Motorcraft SP546 spark plug offers excellent performance. I had stockpiled plugs when supply was lower and didn't have to deal with this. To get straight to the point the best Spark Plugs for an Ecoboost 3.5l as found in many Ford F-150 trucks etc., are the Motorcraft SP-534 plugs. Please be advised that this is a common error with these spark plugs in general coming with wrong gaps when buying new. 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