Description
The Motorcraft SP486X Spark Plug (AGSF42FMX) is engineered to meet strict Ford Motor Company standards for performance, durability, and long service life. Designed to help maintain peak engine performance throughout its service interval, this spark plug typically supports 60,000 to 100,000 miles of reliable operation in properly specified applications.
Motorcraft spark plugs are matched to specific engine requirements to help reduce misfires, improve fuel efficiency, and support emissions compliance. Manufactured with high-quality materials, the SP486X provides dependable ignition performance across a broad range of passenger vehicles, trucks, vans, and commercial applications.
Whether used as an OEM replacement spark plug for routine maintenance or service repair, this plug is built to deliver consistent combustion performance, dependable fitment, and long-term reliability.
Features
- Motorcraft spark plug part number SP486X
- Plug number AGSF42FMX
- Meets Ford engineering standards for quality and durability
- Designed to maintain peak engine performance over extended service intervals
- Typical service life of 60,000 to 100,000 miles
- Helps reduce misfires and support efficient fuel combustion
- Supports emissions compliance and engine performance
- Engine-specific design for proper fit and function
- Suitable for a wide range of automotive, truck, van, and commercial applications
- Manufactured with high-quality materials for long-lasting reliability
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Brand: Motorcraft
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Dimensions: 1.00 L x 1.00 W x 3.38 H in
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Weight: 0.10 lb
Fitment
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Ford Aerostar: 1986 – 2.8L Gas; 1990–1996 – 4.0L Gas
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Ford Bronco II: 1984–1990 – 2.8L Gas, 2.9L Gas
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Ford Courier: 1978–1982 – 2.0L Gas, 2.3L Gas
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Ford E-150 Econoline: 1997 – 4.2L Gas
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Ford E-150 Econoline Club Wagon: 1997 – 4.2L Gas
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Ford E-250 Econoline: 1997 – 4.2L Gas
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Ford Explorer: 1991–1996 – 4.0L Gas
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Ford F-150: 1997 – 4.2L Gas
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Ford Fairmont: 1978–1982 – 2.3L Gas
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Ford Freestar: 2004–2005 – 3.9L Gas, 4.2L Gas
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Ford Granada: 1981–1982 – 2.3L Gas
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Ford Mustang: 1979–1982 – 2.3L Gas, 2.8L Gas; 1998–2004 – 3.8L Gas, 3.9L Gas
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Ford Mustang II: 1977–1978 – 2.3L Gas, 2.8L Gas
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Ford Pinto: 1977–1980 – 2.3L Gas, 2.8L Gas
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Ford Ranger: 1983–1996 – 2.0L, 2.8L, 2.9L, 4.0L Gas
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Ford Tempo: 1988–1994 – 2.3L Gas
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Ford Windstar: 1996–2003 – 3.8L Gas
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Mercury Bobcat: 1977–1980 – 2.3L Gas, 2.8L Gas
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Mercury Capri: 1977, 1979–1982 – 2.3L Gas, 2.8L Gas
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Mercury Cougar: 1981 – 2.3L Gas
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Mercury Monterey: 2004–2005 – 3.9L Gas, 4.2L Gas
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Mercury Topaz: 1988–1994 – 2.3L Gas
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Mercury Zephyr: 1978–1982 – 2.3L Gas
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Buick Century: 1989–1991 – V6 3.3L
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Buick Electra: 1988–1990 – V6 3.8L
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Buick LeSabre: 1988–1992 – V6 3.8L
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Buick Park Avenue: 1991–1992 – V6 3.8L
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Buick Reatta: 1988–1991 – V6 3.8L
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Buick Regal: 1990–1992 – V6 3.8L
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Buick Riviera: 1988–1992 – V6 3.8L
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Buick Skylark: 1989–1992 – V6 3.3L; 1995–1998 – L4 2.3L, 2.4L
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Cadillac Allante: 1987–1993 – V8 4.1L, 4.5L, 4.6L
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Cadillac Commercial Chassis: 1985–1994 – V8 4.1L, 4.5L, 4.9L, 5.7L
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Cadillac DeVille: 1982–1992 – V8 4.1L, 4.5L, 4.9L
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Cadillac Eldorado: 1982–1996 – V8 4.1L, 4.5L, 4.9L, 4.6L
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Cadillac Escalade: 1999–2000 – V8 5.7L
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Cadillac Fleetwood: 1982–1994 – V8 4.1L, 4.5L, 4.9L, 5.7L
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Cadillac SRX: 2004–2006 – V8 4.6L
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Cadillac STS: 2005–2006 – V8 4.6L
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Cadillac Seville: 1982–1996 – V8 4.1L, 4.5L, 4.9L, 4.6L
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Cadillac XLR: 2004–2006 – V8 4.6L
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Chevrolet Astro: 1996–2005 – V6 4.3L
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Chevrolet Blazer: 1996–2005 – V6 4.3L
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Chevrolet C1500: 1996–1999 – V6 4.3L, V8 5.0L, 5.7L
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Chevrolet C1500 Suburban: 1996–1999 – V8 5.7L
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Chevrolet C2500: 1996–2000 – V8 5.0L, 5.7L, 7.4L
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Chevrolet C2500 Suburban: 1996–1999 – V8 5.7L, 7.4L
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Chevrolet C3500: 1996–2000 – V8 5.7L, 7.4L
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Chevrolet C3500HD: 1996–2000 – V8 7.4L
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Chevrolet Cavalier: 1996–2002 – L4 2.4L
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Chevrolet Corvette: 1992–1995 – V8 5.7L
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Chevrolet Express 1500: 1996–2009 – V6 4.3L, V8 5.0L, 5.7L
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Chevrolet Express 2500: 1996–2006 – V6 4.3L, V8 5.0L, 5.7L
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Chevrolet Express 3500: 1996–2002 – V8 5.7L, 7.4L
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Chevrolet G30: 1996 – V6 4.3L
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Chevrolet K1500: 1996–1999 – V6 4.3L, V8 5.0L, 5.7L
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Chevrolet K1500 Suburban: 1996–1999 – V8 5.7L
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Chevrolet K2500: 1996–2000 – V8 5.0L, 5.7L, 7.4L
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Chevrolet K2500 Suburban: 1996–1999 – V8 5.7L, 7.4L
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Chevrolet K3500: 1996–2000 – V8 5.7L, 7.4L
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Chevrolet Lumina: 1996–1997 – V6 3.4L
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Chevrolet Lumina APV: 1992 – V6 3.8L
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Chevrolet Malibu: 1997–1998 – L4 2.4L
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Chevrolet Monte Carlo: 1996–1997 – V6 3.4L
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Chevrolet P30: 1996–1999 – V6 4.3L, V8 5.7L, 7.4L
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Chevrolet S10: 1996–2004 – V6 4.3L
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Chevrolet Silverado 1500: 1999–2009 – V6 4.3L
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Chevrolet Silverado 1500 Classic: 2007 – V6 4.3L
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Chevrolet Tahoe: 1996–2000 – V8 5.7L
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Chevrolet Vega: 1975 – L4 2.0L
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Chevrolet W3500 Tiltmaster: 1995–2003 – V8 5.7L
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Chevrolet W4500 Tiltmaster: 1998–2003 – V8 5.7L
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GMC C1500: 1996–1999 – V6 4.3L, V8 5.0L, 5.7L
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GMC C1500 Suburban: 1996–1999 – V8 5.7L
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GMC C2500: 1996–2000 – V8 5.0L, 5.7L, 7.4L
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GMC C2500 Suburban: 1996–1999 – V8 5.7L, 7.4L
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GMC C3500: 1996–2000 – V8 5.7L, 7.4L
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GMC C3500HD: 1996–2000 – V8 7.4L
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GMC Jimmy: 1996–2001 – V6 4.3L
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GMC K1500: 1996–1999 – V6 4.3L, V8 5.0L, 5.7L
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GMC K1500 Suburban: 1996–1999 – V8 5.7L
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GMC K2500: 1996–2000 – V8 5.0L, 5.7L, 7.4L
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GMC K2500 Suburban: 1996–1999 – V8 5.7L, 7.4L
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GMC K3500: 1996–2000 – V8 5.7L, 7.4L
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GMC P3500: 1996–1999 – V6 4.3L, V8 5.7L, 7.4L
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GMC Safari: 1996–2005 – V6 4.3L
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GMC Savana 1500: 1996–2009 – V6 4.3L, V8 5.0L, 5.7L
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GMC Savana 2500: 1996–2006 – V6 4.3L, V8 5.0L, 5.7L
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GMC Savana 3500: 1996–2002 – V8 5.7L, 7.4L
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GMC Sierra 1500: 1999–2009 – V6 4.3L
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GMC Sierra 1500 Classic: 2007 – V6 4.3L
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GMC Sonoma: 1996–2004 – V6 4.3L
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GMC Yukon: 1996–2000 – V8 5.7L
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Isuzu Hombre: 1997–2000 – V6 4.3L
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Jaguar S-Type: 2000–2002 – V6 3.0L
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Jaguar X-Type: 2002 – V6 2.5L, 3.0L
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Mercury Bobcat: 1977–1980 – L4 2.3L, V6 2.8L
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Mercury Capri: 1977, 1979–1982 – 2.3L Gas, 2.8L Gas
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Mercury Cougar: 1981 – 2.3L Gas
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Mercury Monterey: 2004–2005 – 3.9L Gas, 4.2L Gas
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Mercury Topaz: 1988–1994 – 2.3L Gas
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Mercury Zephyr: 1978–1982 – 2.3L Gas
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Oldsmobile 88: 1992 – V6 3.8L
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Oldsmobile 98: 1988–1992 – V6 3.8L
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Oldsmobile Achieva: 1992, 1995–1998 – V6 3.3L; L4 2.3L, 2.4L
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Oldsmobile Alero: 1999–2001 – L4 2.4L
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Oldsmobile Aurora: 1995–1996 – V8 4.0L; 2001–2002 – V6 3.5L
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Oldsmobile Bravada: 1996–2001 – V6 4.3L
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Oldsmobile Cutlass Calais: 1989–1991 – V6 3.3L
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Oldsmobile Cutlass Ciera: 1989–1992 – V6 3.3L
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Oldsmobile Cutlass Cruiser: 1989–1992 – V6 3.3L
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Oldsmobile Cutlass Supreme: 1996 – V6 3.4L
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Oldsmobile Delta 88: 1988–1991 – V6 3.8L
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Oldsmobile Intrigue: 1999–2002 – V6 3.5L
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Oldsmobile Silhouette: 1992 – V6 3.8L
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Oldsmobile Toronado: 1988–1992 – V6 3.8L
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Pontiac Bonneville: 1988–1993 – V6 3.8L
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Pontiac Firebird: 1993 – V8 5.7L
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Pontiac Grand Am: 1992, 1995–1998, 2000–2001 – V6 3.3L; L4 2.3L, 2.4L
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Pontiac Grand Prix: 1996 – V6 3.4L
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Pontiac Sunfire: 1995–2002 – L4 2.3L, 2.4L
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Pontiac Trans Sport: 1992–1993 – V6 3.8L
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Workhorse FasTrack FT1061: 2002–2004 – V8 5.7L
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Workhorse FasTrack FT1260: 2000–2001 – V8 5.7L
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Workhorse FasTrack FT1261: 2002–2005 – V8 5.7L
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Workhorse FasTrack FT1460: 2000–2002 – V8 5.7L
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Workhorse FasTrack FT1461: 2002–2005 – V8 5.7L
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Workhorse FasTrack FT1600: 2000–2001 – V8 5.7L
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Workhorse FasTrack FT1601: 2002–2005 – V8 5.7L
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Workhorse FasTrack FT1800: 2000–2001 – V8 5.7L
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Workhorse FasTrack FT1801: 2002–2004 – V8 5.7L
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Workhorse FasTrack FT1802: 2002–2003 – V8 5.7L
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Workhorse FasTrack FT931: 2002–2003 – V6 4.3L
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Workhorse P30: 2000–2005 – V8 5.7L
