{"product_id":"motorcraft-sp546x-spark-plug-oem-replacement-for-ford-expedition-f-150-super-duty-navigator-and-lincoln-mark-lt","title":"Motorcraft SP546X Spark Plug – OEM Replacement for Ford Expedition, F-150, Super Duty, Navigator and Lincoln Mark LT","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMotorcraft SP546X is a direct OEM replacement spark plug designed to deliver consistent ignition performance for a broad range of Ford and Lincoln vehicles. Built with a copper core, platinum electrode tip, and nickel ground electrode, this plug is engineered to withstand the heat and wear of gasoline engines while maintaining precise gaps and fitment you expect from Ford engineering standards.\u003c\/p\u003e\n\n\u003ch3\u003eWhy choose Motorcraft SP546X\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect OEM replacement for engines that left the assembly line with the same components you install during service\u003c\/li\u003e\n  \u003cli\u003eCopper core and platinum electrode tip with nickel ground electrode for reliable ignition and durable performance\u003c\/li\u003e\n  \u003cli\u003eMeets the rigorous Ford Engineering standards and original equipment specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDurability and reliable combustion stand out in daily driving. The copper core assists with heat transfer, while the platinum tip and nickel ground electrode are selected for long life and stable operation under a variety of driving conditions. SP546X supersedes earlier variants to ensure compatibility with the engines of its era.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility and fitment\u003c\/h3\u003e\n\u003cp\u003eThis spark plug is specified for a broad lineup, including Ford Expedition (2005-2008), F-150 (2004-2008), F-250\/350\/450 Super Duty (2005-2008\/2005-2010), F-53 Motorhome Chassis (2006-2008), F-550 (2005-2010), and Lincoln models such as Mark LT (2006-2008) and Navigator (2005-2008). Each engine benefits from a matched plug that preserves original performance characteristics.\u003c\/p\u003e\n\n\u003ch3\u003eWhat to expect in daily driving\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eImproved reliability and smoother starts under varied temperatures and loads\u003c\/li\u003e\n  \u003cli\u003ePotential reduction in misfires, especially in older or higher-mileage engines\u003c\/li\u003e\n  \u003cli\u003eConsistent fuel economy and reduced emissions within manufacturer specifications\u003c\/li\u003e\n  \u003cli\u003eOEM-grade fit, ensuring proper reach, heat range, and gap for compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackaging and value\u003c\/h3\u003e\n\u003cp\u003ePackaging includes a single spark plug per box, aligning with standard OEM replacement practices. The compact dimensions (approximately 3.63 x 1 x 1 inches) make handling straightforward during maintenance and service intervals.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What Ford and Lincoln models are compatible with SP546X?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: SP546X is an OEM replacement for Ford Expedition, F-150, Super Duty, F-53 motorhome, F-550, and Lincoln Navigator and Mark LT models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What benefits might Motorcraft SP546X provide?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Designed to Ford standards, it aims to improve durability, reduce misfires, and support efficiency, without promising guaranteed results.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Motorcraft","offers":[{"title":"Default Title","offer_id":42465513406549,"sku":"B09GWBC6PK","price":30.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/motorcraft-spark-plug-sp546x-closeup.jpg?v=1778010503","url":"https:\/\/plentytorque.co.uk\/products\/motorcraft-sp546x-spark-plug-oem-replacement-for-ford-expedition-f-150-super-duty-navigator-and-lincoln-mark-lt","provider":"PlentyTorque","version":"1.0","type":"link"}