Castrol RX Super SAE 15W40 API CF4 is suitable for use in naturally-aspirated, turbocharged or supercharged diesel engines.
Castrol RX Super Max SAE 15W40 API CH4 is a long drain premium design engine oil for new generation turbo trucks.
Castrol RX Super Turbo SAE 15W40 API CI4 Plus is a mixed fleet design engine oil especially designed to provide excellent protection for fleets containing vehicles from a variety of manufacturers. It is a truly versatile product which can e used in BSIII & BSIV trucks, buses & off-road vehicles.
CASTROL RX ESSENTIAL 15W-40 API CI-4 Plus it is suitable for use in naturally-aspirated, turbocharged or supercharged diesel engines that use a broad range of fuel qualities.