Western Star Trucks Oil Type and Fluid Specifications

Use this Western Star catalog page to find maintenance fluid specifications by model, generation and engine version.

Western Star Models

Fluid capacity and lubricant specifications for Western Star trucks can vary across engines, transmissions and regional equipment packages.

When servicing a vehicle, always confirm the listed capacity, viscosity and OEM approvals with the owner’s manual or official service information.

This section currently includes 2 model links, 12 popular specification pages and 3 fluid category links for Western Star.