Castrol RX Super Diesel Engine Oil - 15W-40, CJ-4/E9 – 20 Litres

Castrol RX SUPER 15W-40 CJ-4/E9 is an advanced heavy-duty diesel engine oil designed for high-speed 4-stroke diesel engines running on a broad range of fuel qualities. It's fully compatible with modern diesel engines fitted with EGR and the latest exhaust after-treatment systems, including DPF, DOC, and SCR.

Recommended for naturally aspirated and turbocharged diesel engines in trucks, tractors, buses, LCVs, off-highway equipment, agricultural machinery, and fixed plant equipment.

Engineered with Castrol's specialized DuraShield™ Technology, this oil delivers up to 40% better wear protection* by preventing soot agglomeration and forming a resilient protective layer on moving metal surfaces — even under severe operating conditions and difficult engine environments.

*Average of wear parameters in industry tests vs industry standard limits.

Key Benefits:

• Advanced heavy-duty protection for high-speed diesel engines
• Compatible with EGR, DPF, DOC, and SCR systems
• DuraShield™ Technology reduces soot agglomeration and wear
• Resists breakdown under severe operating conditions
• Suitable for trucks, tractors, buses, LCVs, and off-highway equipment

Tech Specifications: