Gulf Western TOP DOG XDO 15W-40 is a heavy duty, high performing mineral diesel engine oil engineered and formulated to meet API CI-4/SL specifications. Gulf Western TOP DOG XDO provides advanced protection from engine wear commonly caused by sludge build up while also keeping your engine oil cleaner and providing extended oil drain intervals. Start-up wear is also minimised thanks to the outstanding low temperature viscosity characteristics of Gulf Western TOP DOG XDO.

Gulf Western TOP DOG XDO 15W-40 is suitable for use in diesel engines requiring API CI-4/SL, ACEA E7 or earlier specification oils including vehicles fitted with Exhaust Gas Recirculation or ECR Systems. TOP DOG XDO has been designed to work well in the harshest environments while meeting OEM requirements and approvals from Mack, Volvo, Detroit and... Cummins. Gulf Western TOP DOG XDO is also a true multi fleet universal diesel oil and is safe to use in most stationary engines, earth moving and road transport applications as well as light commercial diesel applications and even Allison transmissions requiring C3/C4 specification Fluids.