Shop

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

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

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

Royal Purple Duralec Ultra Diesel 15W40 CK-4 Motor Oil – 5 Gallon

Royal Purple’s advanced Synerlec technology provides an exceptional film strength by reducing friction for peak engine performance. Synerlec also provides outstanding oxidation resistance to safely extend oil drains, and an ionic attraction to metal components maintaining a film of oil on parts minimizing start-up wear.

Royal Purple’s advanced Synerlec technology provides an exceptional film strength by reducing friction for peak engine performance. Synerlec also provides outstanding oxidation resistance to safely extend oil drains, and an ionic attraction to metal components maintaining a film of oil on parts minimizing start-up wear.

The ashless formulation and synthetic solvency of HP 2-C keeps spark plugs and exhaust ports clean for maximum engine efficiency. HP 2-C is formulated with Royal Purple’s proprietary, synthetic Synerlec additive technology that protects rings, bearings and cylinder walls from metal-to-metal contact and guards against scuffing, galling and welding, which can occur in severe conditions. This engine cleanliness combined with the low coefficient of friction of Royal Purple HP 2-C promotes increased horsepower and engine speed. Engines operate with greater combustion efficiency and go longer between overhauls when lubricated with HP 2-C.

Royal Purple HPS oils are fortified with a high level of zinc / phosphorus anti-wear additive and a generous dose of Royal Purple’s proprietary Synerlec additive technology. These unique formulations enable HPS oils to outperform leading synthetic and conventional lubricants in both gasoline and diesel engines.

Royal Purple HPS oils are fortified with a high level of zinc / phosphorus anti-wear additive and a generous dose of Royal Purple’s proprietary Synerlec additive technology. These unique formulations enable HPS oils to outperform leading synthetic and conventional lubricants in both gasoline and diesel engines.

Royal Purple High Performance Motor Oil European Formula SAE 0W-20 Dexos D, 0W-40, 5W-30, and 5W-40 are formulated exclusively with premium synthetic base stocks and advanced additive technology to deliver trusted engine protection and peak vehicle performance. Royal Purple European Formulation motor oils provide excellent resistance to sludge and varnish deposits during stop-and-go driving and other severe operating conditions. Recommended for use in European passenger car gasoline/petrol engines, and light duty diesel engines including turbocharged and direct injection diesel engines with a diesel particulate filter (DPF) and selective catalysts. Premium synthetic formulation delivers excellent oxidation stability and low volatility properties, resulting in reduced oil consumption between services.

• Superior Low-Temperature Performance
• Superior Corrosion Protection
• Excellent Oxidation Stability
• Increased Fuel Efficiency
• Better Wear Protection