Castrol CRB Monograde 50

Castrol CRB Monograde 50 CF is a diesel engine oil designed for use in heavy duty diesel engines, hydraulic systems and transmissions that specify the use of monograde diesel engine oil.
 
Castrol CRB Monograde 50 CF helps combat issues in two ways:
It contains cleaning agents which help to displace particles that may otherwise build up on your engine surfaces reducing deposits.
It also contains anti-oxidants which help to disrupt the chemical reactions that can lead to oil thickening.