Castrol RX SUPER 15W-40 CJ-4/E9 is an advanced, heavy duty diesel engine oil. It is suitable for use in high speed 4- stroke diesel engines that use a broad range of fuel qualities. It is compatible with diesel engines fitted with EGR and the latest exhaust after treatment systems such as; DPF, DOC and/or SCR.

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

Castrol RX SUPER 15W-40 CJ-4/E9 with DuraShield™ Technology is proven in industry testing to provide protection to your engine in two ways: Under severe engine operating conditions soot can agglomerate to form large particles which displace oil on moving metal surfaces. This results in metal to metal contact. Castrol RX SUPER 15W-40 CJ-4/E9 with DuraShield™ Technology helps to prevent the agglomeration of soot as well as protecting surfaces from wear.

Castrol RX SUPER 15W-40 CJ-4/E9 with DuraShield™ Technology provides a protective layer on the moving metal surfaces which resists break down even under difficult conditions.

*average of wear parameters in industry tests vs industry standard limits