NGK 6579 Spark Plug

NGK Laser Platinum Spark Plug 6579

NGK 6579 is a Laser Platinum spark plug built to OE-style specifications for a wide range of Ford, Mazda, and other applications. It uses a platinum center electrode, copper core construction, and a tapered seat to support consistent ignition performance in engines that call for a 0.044 in. gap.

Key Features

• Laser Platinum design with platinum center electrode tip for stable spark delivery
• Copper core center and ground electrodes for efficient heat transfer
• Pre-gapped at 0.044 in. for many listed applications
• 5000 ohm resistance for ignition system compatibility
• Tapered seat, 14 mm thread diameter, 5/8 in. hex size
• OE-equivalent design for direct replacement service

Product Line Details

NGK’s Laser Platinum line is positioned for OE replacement service where long service intervals and consistent ignition characteristics matter. The platinum tip helps maintain electrode stability over time, while the copper core construction supports heat control in everyday driving and higher-mileage maintenance schedules.

Detailed Description

This NGK spark plug, part number 6579, is cross-referenced to NGK PTR5F-11 and is listed for a broad range of vehicles including Ford Ranger, Ford Taurus, Mazda B2300, and Ford E-Series vans. It is also listed for applications such as the 2001-2009 Ford Ranger, 2003-2008 Mazda 6, and 2011-2014 Ford E-150 and E-250. The OE-equivalent design and 0.044 in. gap make it a direct-service choice for engines specified around this heat range and seat style.

NGK is a major OE spark plug supplier in North America with decades of manufacturing experience across automotive, motorcycle, marine, and small engine applications. That OE background is reflected in the construction of this plug, which uses a standard ground configuration, non-removable nut terminal, and a manufacturer heat range of 5.

Common Problems This Part Can Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from inconsistent spark delivery
• Maintenance intervals overdue on Ford Ranger, Mazda B2300, or Ford Taurus applications

Installation Notes and Tips

Verify engine application and plug gap before installation. This plug is listed with a 0.044 in. pre-gap for many applications, but some fitments note a different required gap, so confirm the vehicle-specific specification before use. Use the tapered seat and 14 mm thread size only where the engine calls for that configuration. For best results, inspect ignition wires or coils during service, especially on higher-mileage Ford Ranger and Mazda B2300 engines.

Quality Assurance

NGK manufactures OE and aftermarket ignition components to original equipment standards, with North American and global production and distribution support. Part number 6579 is built for durability and consistent operational performance in the listed applications.