Is this product for you?

Castrol RX Diesel 15W-40 is a high quality mid-ash heavy duty diesel engine oil which meets all the performance requirements of the American Petroleum Institute (API) CI-4 specification.

What vehicles is this product suitable for?

Castrol RX Diesel 15W-40 is recommended for diesel engine heavy duty plant, highway and off-road operations, and may also be used in mixed fleets. It is particularly suitable for use in US engine technology pre ADR 80/02, such as Cummins, Mack, Caterpillar and Detroit Diesel (4-cycle) heavy duty diesel engines, and can be used in turbocharged and naturally aspirated diesel engines requiring an oil meeting API CI-4 or earlier specification.
Castrol RX Diesel 15W-40 is also suitable for use in diesel 4WDs and light commercial vehicles not fitted with DPFs or DPDs.
For technical assistance on engine makes not shown or mixed fleet operations, contact the Castrol Technical Helpline 1300 557 998

To find the oil type and weight suggested for your vehicle; either add your vehicle to My Garage or check with your manufacturer, vehicle user manual, your local mechanic or head in-store and talk to one of our friendly team.