AMSOIL Signature Series 5W-40 Max-Duty Diesel Oil
100% synthetic diesel oil option with strong cold-start flow. Verify the required viscosity and specification for your exact engine before ordering.
View 5W-40 at AMSOILDuramax Diesel Guide
AMSOIL for Duramax Diesel Trucks
Match AMSOIL products to your exact Chevrolet or GMC Duramax model year and drivetrain.
Featured AMSOIL products
These products are relevant to this guide. Click a product to view current specifications and availability for the selected application.
AMSOIL Signature Series 15W-40 Max-Duty Diesel Oil
100% synthetic diesel oil option for severe-duty applications. Confirm your engine's required viscosity and specifications before ordering.
View 15W-40 at AMSOILProduct images courtesy of AMSOIL INC. Product availability and specifications can change; verify fitment before ordering.
AMSOIL products for Duramax applications
Chevrolet and GMC Duramax trucks cover many model years and drivetrain combinations. Use the exact vehicle lookup to match diesel engine oil, transmission fluid, gear oil and filters to your truck.
Build a complete tow-vehicle plan
Heavy towing places sustained load on the engine and drivetrain. Correct fluid specifications, filtration and scheduled maintenance are more important than simply choosing a premium brand.
Related AMSOIL guides
Frequently asked questions
Does AMSOIL make diesel oil for Duramax trucks?
AMSOIL offers diesel engine oils suitable for many Duramax applications. Use the exact model year and specification in the vehicle lookup to confirm the current recommendation.
What else should I service on a Duramax tow vehicle?
Along with engine oil and filters, review fuel filtration, transmission fluid, transfer-case fluid where applicable and differential gear oil according to the manufacturer’s schedule.