Royal Purple 87540 Duralec Super SAE 5W-40 Diesel Motor Oil

Royal Purple Duralec Super SAE 5W-40 is a premium full synthetic diesel engine oil engineered to deliver exceptional protection and performance in modern diesel engines. Formulated with Royal Purple's proprietary Synerlec additive technology, Duralec Super provides superior film strength, enhanced wear protection, and outstanding resistance to oxidation and thermal breakdown under the extreme demands of diesel operation.

Key Features:

• Full Synthetic Formula: Designed specifically for high-performance diesel engines requiring a 5W-40 viscosity grade
• Synerlec Additive Technology: Royal Purple's proprietary additive chemistry creates a stronger, more durable lubricating film compared to conventional and other synthetic oils
• Enhanced Wear Protection: Reduces metal-to-metal contact to extend engine life and protect critical engine components
• Oxidation & Thermal Stability: Resists breakdown at high operating temperatures, maintaining viscosity and oil integrity over extended drain intervals
• Soot & Deposit Control: Keeps diesel engines clean by suspending and neutralizing combustion byproducts and soot particles
• Cold-Weather Performance: 5W cold-flow rating ensures reliable cold-start protection and rapid oil circulation in low-temperature conditions
• Multi-Standard Compatibility: Formulated to meet or exceed API CJ-4, ACEA C3, and OEM diesel specifications including those from Mercedes-Benz, BMW, Volkswagen, and Porsche

Royal Purple Duralec Super 5W-40 is ideal for use in light-duty and heavy-duty diesel engines, including those equipped with diesel particulate filters (DPF) and exhaust gas recirculation (EGR) systems. Sold as a one-quart container.