Castrol CRB Multi 15W-40 CK-4 is a multi-purpose, heavy-duty engine oil designed to provide superior protection to diesel engines. It is engineered to promote long and healthy engine life, offering protection to diesel engines in a variety of applications and duty cycles. Castrol CRB Multi 15W-40 CK-4 conforms to the strict requirements of PC-11 engine oil technology and can be used in diesel engines where API CK-4, CJ-4 and below is required.

Versatility for Heavy Duty and Commercial Vehicles

Castrol CRB Multi 15W-40 CK-4 can be used in a wide range of heavy duty and commercial vehicles; this versatility makes it ideal for use in mixed fleets. Its special formulation helps to keep diesel engines cleaner and gives more reliable engine protection. This, in turn, prolongs engine life to various vehicles fleet-wide.


Castrol CRB Multi 15W-40 CK-4 offers the following benefits:
  • Protection against oil thickening and deposit build-up in critical engine parts
  • Protection from wear and deposits
  • Protection against viscosity loss for reliable engine protection
  • Better shear stability
Castrol CRB Multi 15W-40 CK-4’s versatility makes it a highly practical solution for workshops and mixed fleets.

Industry Approvals and OEM Specifications

  • API CK-4, CJ-4, CI-4 Plus
  • CAT ECF-3