# Royal Purple Duralec Ultra Diesel 15W40 CK-4 Motor Oil - 1 Gallon Duralec Ultra combines premium base oils with Royal Purple's proprietary additive technology, Synerlec, to create a high-performance motor oil that optimizes engine performance and provides superior protection in rigorous on/off highway applications. Synerlec provides unsurpassed film strength and lubricity – up to 4X more than top competitors. In addition, advanced synthetic solvency reduces engine deposits and keeps engines clean. The net result is a better performing engine, with reduced downtime and lower cost of ownership. Royal Purple recommends for use in a variety of heavy-duty applications including commuting, over-the-road trucking, agriculture, construction and mining. - Extraordinary performance in older generation, high-output diesel engines - Maximum wear protection – up to 33% better than CK-4 requirements - Extended oil life – up to 40% better than CK-4 requirements - Improved cold flow operation and start-up protection - Reduced oil consumption This Part Fits: Year Make Model Submodel 1996-1997 Acura SLX Base 1996-1999 Acura SLX Premium 1994-2001 AM General Hummer Base 1997-1998 Aston Martin DB7 Base 2000-2002 Aston Martin DB7 Vantage 2000-2002 Aston Martin DB7 Vantage Volante 1997-1998 Aston Martin DB7 Volante 1991-1998 BMW 318i Base 1991-1997 BMW 318is Base 1995-1999 BMW 318ti Base 1986-1988 BMW 325 Base 1986-1987 BMW 325e Base 1986-1987 BMW 325es Base 1987-1995 BMW 325i Base 1987-1995 BMW 325is Base 1988-1991 BMW 325iX Base 1996-1997 BMW 328i Base 1996-1997 BMW 328is Base 1989-1995 BMW 525i Base 1993 BMW 525iT Base 1994-1995 BMW 530i Base 1989-1993 BMW 535i Base 1994-1995 BMW 540i Base 1988-1991,1995-1998 BMW M3 Base 1995 BMW M3 Lightweight 1997,1999-2000 Chevrolet C3500 Base 1997-1998 Chevrolet C3500 Cheyenne 1999-2000 Chevrolet C3500 LS 1997-1998 Chevrolet C3500 Silverado 1997-2002 Chevrolet Express 2500 Base 1996-2002 Chevrolet Express 2500 LS 1996-2002 Chevrolet Express 3500 Base 1996-2002 Chevrolet Express 3500 LS 2002-2005 Chevrolet Silverado 2500 HD Base 2002-2006 Chevrolet Silverado 2500 HD LS 2002-2006 Chevrolet Silverado 2500 HD LT 2004-2006 Chevrolet Silverado 2500 HD WT 2002-2005 Chevrolet Silverado 3500 Base 2002-2006 Chevrolet Silverado 3500 LS 2002-2006 Chevrolet Silverado 3500 LT 2004,2006 Chevrolet Silverado 3500 WT 1994-2001 Dodge Ram 2500 Base 2003,2005-2010 Dodge Ram 2500 Laramie 2003-2010 Dodge Ram 2500 SLT 2006-2007 Dodge Ram 2500 Sport 2003-2010 Dodge Ram 2500 ST 2008-2010 Dodge Ram 2500 SXT 2010 Dodge Ram 2500 TRX 2006-2007 Dodge Ram 2500 TRX4 2003-2010 Dodge Ram 3500 Laramie 2003-2010 Dodge Ram 3500 SLT 2006-2007 Dodge Ram 3500 Sport 2003-2010 Dodge Ram 3500 ST 2008-2009 Dodge Ram 3500 SXT 2007 Dodge Ram 3500 TRX4 2003-2006,2009 Dodge Sprinter 2500 Base 2003-2006,2009 Dodge Sprinter 3500 Base 2003-2005 Ford E-350 Club Wagon Chateau 2003-2005 Ford E-350 Club Wagon XL 2003-2005 Ford E-350 Club Wagon XLT 1995-1998 Ford E-350 Econoline Base 1995-1998 Ford E-350 Econoline XL 1995-2002 Ford E-350 Econoline Club Wagon Chateau 1995-1996 Ford E-350 Econoline Club Wagon Chateau HD 1995-2000 Ford E-350 Econoline Club Wagon Custom 2001-2002 Ford E-350 Econoline Club Wagon XL 1995-1998 Ford E-350 Econoline Club Wagon XL HD 1995-2002 Ford E-350 Econoline Club Wagon XLT 1995-1998 Ford E-350 Econoline Club Wagon XLT HD 1999-2010 Ford E-350 Super Duty Base 2006 Ford E-350 Super Duty Chateau 1999-2000,2006-2008,2010 Ford E-350 Super Duty XL 2006-2010 Ford E-350 Super Duty XLT 2003-2005 Ford Excursion Eddie Bauer 2000-2005 Ford Excursion Limited 2004-2005 Ford Excursion XLS 2000-2005 Ford Excursion XLT 1997 Ford F-250 HD XL 1997 Ford F-250 HD XLT 2009-2010 Ford F-250 Super Duty Cabela's 2008-2009 Ford F-250 Super Duty FX4 2004-2010 Ford F-250 Super Duty Harley-Davidson Edition 2004-2026 Ford F-250 Super Duty King Ranch 1999-2026 Ford F-250 Super Duty Lariat 2018-2024 Ford F-250 Super Duty Limited 2013-2026 Ford F-250 Super Duty Platinum 1999-2026 Ford F-250 Super Duty XL 1999-2026 Ford F-250 Super Duty XLT 2009-2010 Ford F-350 Super Duty Cabela's 2008-2009 Ford F-350 Super Duty FX4 2004-2010 Ford F-350 Super Duty Harley-Davidson Edition 2003-2026 Ford F-350 Super Duty King Ranch 1999-2026 Ford F-350 Super Duty Lariat 2018-2024 Ford F-350 Super Duty Limited 2013-2026 Ford F-350 Super Duty Platinum 1999-2026 Ford F-350 Super Duty XL 1999-2026 Ford F-350 Super Duty XLT 1993-1997 Ford Probe Base 1993-1997 Ford Probe GT 1997 Ford Probe GTS 1993-1996 Ford Probe SE 1995-1997 Ford Windstar Base 1995-1997 Ford Windstar GL 2002,2004-2006 Freightliner Sprinter 2500 Base 2002,2004-2006 Freightliner Sprinter 3500 Base 1993 Honda Accord 10th Anniversary 1996 Honda Accord 25th Anniversary Edition 1990-1997 Honda Accord DX 1990-1997 Honda Accord EX 1990-1997 Honda Accord LX 1991,1993,1997 Honda Accord SE 1996-1997 Honda Accord Value Package 1999-2001 Honda CR-V EX 1999-2001 Honda CR-V LX 2000-2001 Honda CR-V SE 1994-1996 Honda Passport DX 1994-2002 Honda Passport EX 1994-2002 Honda Passport LX 2006 Hummer H1 Alpha 2002-2004 Hummer H1 Base 1999-2000 Hyundai Accent GL 1999-2000 Hyundai Accent GS 1999-2002 Hyundai Accent L 2007-2008 Hyundai Santa Fe GLS 2007-2008 Hyundai Santa Fe Limited 2007-2008 Hyundai Santa Fe SE 2004 Isuzu Rodeo S 1988-1989 Isuzu Trooper LS 1989-1990 Isuzu Trooper RS 1988-1991 Isuzu Trooper S 1988-1989 Isuzu Trooper XS 2002 Jaguar XKR 100 2000-2002 Jaguar XKR Base 2001 Jaguar XKR Silverstone 2006-2007 Kia Optima EX 2006-2007 Kia Optima LX 2016-2017 Kia Sorento EX 2016 Kia Sorento SX Limited 1993 Land Rover Defender 110 Base 1994-1995,1997 Land Rover Defender 90 Base 1997 Land Rover Defender 90 LE 1998 Land Rover Discovery 50th Anniversary Edition 1994-1995 Land Rover Discovery Base 1998 Land Rover Discovery LE 1997-1998 Land Rover Discovery LSE 1996-1997 Land Rover Discovery SD 1996-1997 Land Rover Discovery SE 1996-1997 Land Rover Discovery SE7 1997 Land Rover Discovery XD 1990-1991 Lexus ES250 Base 1997-2004 Lotus Esprit V8 2013-2018 Ram 2500 Big Horn 2011-2018 Ram 2500 Laramie 2014-2015 Ram 2500 Laramie Limited 2011-2018 Ram 2500 Laramie Longhorn 2016-2018 Ram 2500 Limited 2013-2015 Ram 2500 Lone Star 2012-2016 Ram 2500 Outdoorsman 2011-2018 Ram 2500 SLT 2011-2013 Ram 2500 ST 2013-2018 Ram 2500 Tradesman 2013-2018 Ram 3500 Big Horn 2011-2019 Ram 3500 Laramie 2014-2015 Ram 3500 Laramie Limited 2011-2018 Ram 3500 Laramie Longhorn 2016-2019 Ram 3500 Limited 2013-2015,2017 Ram 3500 Lone Star 2011-2019 Ram 3500 SLT 2011-2013 Ram 3500 ST 2013-2019 Ram 3500 Tradesman 1999 Saab 9-3 Base 1999 Saab 9-3 SE 1994-1998 Saab 900 S 1998 Saab 900 S Turbo 1994-1997 Saab 900 SE 1994-1998 Saab 900 SE Turbo 1993-1997 Saab 9000 Aero 1991-1992 Saab 9000 Base 1991-1993 Saab 9000 CD 1992 Saab 9000 CD Griffin Edition 1991-1993 Saab 9000 CD Turbo 1993-1994 Saab 9000 CDE 1993-1994 Saab 9000 CDE Turbo 1993-1994 Saab 9000 CS 1993-1994 Saab 9000 CS Turbo 1993-1994 Saab 9000 CSE 1993-1997 Saab 9000 CSE Turbo 1990-1992 Saab 9000 S 1991-1992 Saab 9000 Turbo 2006-2007 Suzuki Grand Vitara Base 2010 Suzuki Grand Vitara Limited 2006-2007,2009 Suzuki Grand Vitara Luxury 2006 Suzuki Grand Vitara Premium 2001 Suzuki Grand Vitara XL-7 2001 Suzuki Grand Vitara XL-7 Limited 2001 Suzuki Grand Vitara XL-7 Plus 2001 Suzuki Grand Vitara XL-7 Touring 2006-2007,2009-2010 Suzuki Grand Vitara XSport 2013 Suzuki Kizashi Base 2010,2013 Suzuki Kizashi GTS ## Details - **Price:** 183.66 CAD - **Vendor:** Royal Purple - **Type:** Motor Oils ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 183.66 CAD | In stock | ## Images - Photo - Primary - User 1 - User 1 --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/royal-purple-duralec-ultra-diesel-15w40-ck-4-motor-oil-1-gallon) > Updated: 2026-07-01