Castrol Rx Super 15W40 CJ-4/E9
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, and is compatible with diesel engines fitted with EGR and the latest exhaust after-treatment systems such as DPF, DOC, and/or SCR.
KEY FEATURES
| •Specially engineered DuraShield™ technology delivers 40% better wear protection, based on the average of wear parameters in industry tests versus industry standard limits |
| •Helps prevent soot from agglomerating into large particles that would otherwise displace oil on moving metal surfaces and cause metal-to-metal contact, while also protecting surfaces from wear |
| •Provides a protective layer on moving metal surfaces that resists breakdown even under difficult conditions |
TECHNICAL SPECIFICATIONS
| Density @ 15°C | 0.8777 g/ml (ASTM D4052) |
| Viscosity, Kinematic 100°C | 15.0 mm²/s (ASTM D445) |
| Viscosity, CCS -20°C | 6650 mPa.s (cP) (ASTM D5293) |
| Viscosity, Kinematic 40°C | 117 mm²/s (ASTM D445) |
| Viscosity Index | 134 (ASTM D2270) |
| Ash, Sulphated | 1.0% wt (ASTM D874) |
| Total Base Number, TBN | 9.8 mg KOH/g (ASTM D2896) |
| Pour Point | -39°C (ASTM D97) |
| Flash Point, PMCC | 200°C (ASTM D93) |
PRODUCT PERFORMANCE CLAIMS
| •ACEA E9 |
| •API CJ-4 |
| •JASO DH-2 |
| •CAT ECF-3 |
| •Cummins CES 20081 |
| •DDC Powerguard 93K218 |
| •Deutz DQC III-18 LA |
| •DTFR 15C100 |
| •Mack EO-O Premium Plus |
| •MTU Oil Category 2.1 |
| •RVI RLD-3 |
| •Volvo VDS-4, VDS-4.5 |
| •Suitable for use in agricultural applications where API CJ-4 or ACEA E9 is required |
STORAGE
| •Store all packages under cover |
| •Where outside storage is unavoidable, lay drums horizontally to avoid water ingress and damage to drum markings |
| •Do not store above 60°C, exposed to hot sun or freezing conditions |
Data Sheet Date: 13 May 2026
The information contained in this data sheet is based on data considered to be accurate. No warranty is expressed or implied regarding the accuracy of this data. Product specifications and availability are subject to change without notice. Lube Control Pty Ltd accepts no responsibility for any loss or damage arising from the use of this information.
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Technical Documents
RX Super 15W-40 CJ-4/E9 - TDS
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Product details and specifications are for reference only and subject to change without notice. Customers must independently verify all technical data and OEM approvals directly with the manufacturer prior to purchase. We accept no liability for any errors, omissions, or damages arising from reliance on this information.