AMSOIL diesel products for engines that work.
Your truck or equipment earns its keep by being ready for the next job. Find diesel engine oil and maintenance products for your application, with a clear route to official product information and help organizing your next order.
What oil does my diesel engine need?
Identify the engine, model year and required oil specification before choosing a diesel oil. Include the emissions equipment and how the vehicle works: hauling, towing, idling or off-road use. Use those details to review the current application recommendation.
Plan the service around the working day
Create a short service list before ordering: engine oil, the correct filters and any other fluids due for attention. Note mileage or operating hours and the planned service date. Keeping this record with the equipment makes repeat purchasing and maintenance handoffs easier.
One truck or a mixed equipment list?
Start with diesel engine oils for the engine. For additional applications, browse heavy-duty diesel equipment products. Compare each component separately before simplifying what you stock. A shared brand does not make every fluid interchangeable.
Can I extend my diesel oil-change interval?
Use the exact oil’s published guidance and your engine manufacturer’s requirements. Workload and service conditions matter. Review AMSOIL’s diesel interval guidance before making a change; some extensions require oil analysis. Our service-interval guide explains the questions to resolve.
Buying for your fleet?
A commercial account is designed for qualifying businesses buying for their own vehicles or equipment. Bring your equipment list and current purchasing needs to the discussion. If you install products in customer vehicles, explore the retail/installer program instead.
Check the details before you order
Use the current product page and your equipment manual to confirm suitability and service instructions. Official resources: AMSOIL application guides · Official diesel engine oil products.
Make the most of the way you buy
Buying for your own vehicles or recreational equipment? Compare Preferred Customer benefits. Selling or installing products for customers? Explore retail and installer accounts. Maintaining company equipment? See commercial accounts.
Make your next service easier
Choose the products for your application, then order directly from AMSOIL. If you have a selection question, send Trey your equipment details and the component you are servicing. You can shop without joining a membership.
Shop by application
Specialty applications
Synthetic Oil Depot
Independent AMSOIL Dealer #5573391
Trey Campo · Spokane, Washington
Serving drivers and businesses in the Inland Northwest and across the U.S.