Royal Purple Duralec Super Synthetic Diesel 5W-40 CK-4 Motor Oil - 1 Gallon (2003-2026 Ford/GM/Ram)

Fits select 2003-2026 Chevrolet, Dodge, Ford, GMC, Hummer, Jeep, Nissan, and Ram diesel vehicles.

Royal Purple Duralec Super is a high-performance synthetic engine oil engineered specifically for modern diesel engines requiring emissions-compliant lubricants. Formulated to meet API CK-4 standards, this 5W-40 oil is designed for 2007 and 2010 emissions equipment, including Diesel Particulate Filters (DPF), Catalytic Converters, Exhaust Gas Recirculation (EGR), and Selective Catalytic Reduction (SCR) systems using ultra-low sulfur diesel (ULSD) fuels.

This synthetic formula is designed to maximize component longevity and safely extend drain intervals while improving fuel efficiency. It provides exceptional resistance to high-temperature thermal breakdown and maintains excellent pumpability in low temperatures to minimize critical wear during cold-induced startups.

• API-licensed CK-4 diesel motor oil
• Superior wear and corrosion protection for internal components
• Fully compatible with modern emissions equipment (DPF, SCR, EGR)
• Formulated for high-temperature stability and low-temperature flow
• Reduces exhaust emissions and keeps engine internals clean
• Will not harm engine seals or gaskets
• Viscosity: 5W-40
• Volume: 1 Gallon