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

Royal Purple Duralec Ultra Diesel 15W-40 CK-4 Motor Oil is formulated with premium base oils and Royal Purple’s proprietary Synerlec additive technology for dependable performance in demanding on- and off-highway applications. Part Number RLP80561 is designed to help optimize engine performance while providing advanced protection for heavy-duty diesel engines used in commuting, over-the-road trucking, agriculture, construction, and mining.
Synerlec technology delivers exceptional film strength and lubricity, helping reduce friction and protect critical engine components under severe operating conditions. Advanced synthetic solvency helps control deposits and maintain engine cleanliness, supporting consistent performance and potentially reducing downtime and overall ownership costs. The 15W-40 viscosity provides improved cold-flow performance and enhanced protection during engine startup across a range of operating environments.
Duralec Ultra is especially suited for older-generation, high-output diesel engines and meets the performance demands associated with CK-4 applications. Its heavy-duty formulation is engineered to help extend oil service life, reduce oil consumption, and provide reliable wear protection during extended operation. This motor oil is supplied in a convenient 1-gallon container and is an appropriate choice for diesel-powered vehicles and equipment requiring a 15W-40 CK-4 lubricant.

Features:

• Heavy-duty diesel formulation: Combines premium base oils with Royal Purple Synerlec additive technology for demanding on- and off-highway applications.

• Enhanced wear protection: Provides up to 33% better wear protection than CK-4 requirements.

• Extended oil life: Delivers oil-life performance up to 40% better than CK-4 requirements.

• High film strength: Helps protect engine components with exceptional lubricity under severe operating conditions.

• Engine cleanliness: Advanced synthetic solvency helps reduce deposits and maintain a cleaner engine.

• Cold-start protection: Supports improved cold-flow operation and startup protection.

• Reduced oil consumption: Formulated to help minimize oil consumption during extended service.

• Versatile application: Recommended for commuting, over-the-road trucking, agriculture, construction, mining, and other heavy-duty diesel uses.