AMSOIL specialty product guide
Signature Series Max-Duty Diesel Oil
Plan protection for hard-working diesel engines, with clear product choices and guidance on extended service.
Trey Campo · Independent AMSOIL Dealer #5573391 | Product guidance from a hands-on owner and equipment operator.
Plan protection around the way your diesel works.
Signature Series Max-Duty is designed for demanding diesel service, with viscosity control and resistance to deposits. Confirm your engine’s specifications before choosing a grade.
What are the published diesel drain limits?
Eligible heavy-duty on/off-road service: up to 3× the OEM interval, capped at 60,000 miles, 600 hours or one year. Eligible turbodiesel pickups: up to 2× the OEM interval, capped at 25,000 miles or one year. Stop at whichever limit comes first.
Performance-modified engines, fuels above 10% ethanol or 15% biodiesel, and 2007–2009 Caterpillar C13/C15 on-highway engines require oil analysis to extend beyond OEM intervals. The 5W-30 DHD extension does not apply to 2007–2010 Dodge, Ford or GM turbodiesel pickups. Use oil analysis for competition intervals. Read the complete product sheet before extending service.
Current AMSOIL references: Reference 1 · Reference 2 · Reference 3
Find your product
Review the application guidance, then choose your product on AMSOIL.
Signature Series 15W-40 Max-Duty Synthetic Diesel Oil
DME · Match 15W-40 to your engine’s requirements. Review the service limits and exclusions above before planning an extended interval.
View Signature Series 15W-40 Max-Duty Synthetic Diesel Oil on AMSOIL
Open Technical Specifications on the corporate page for its current data sheet and safety information.
Confirm your model, year, engine, required specification and service conditions. Use the guidance above and the current corporate instructions for this exact product.
Signature Series 5W-40 Max-Duty Synthetic Diesel Oil
DEO · Match 5W-40 to your engine’s requirements. Review the service limits and exclusions above before planning an extended interval.
View Signature Series 5W-40 Max-Duty Synthetic Diesel Oil on AMSOIL
Open Technical Specifications on the corporate page for its current data sheet and safety information.
Confirm your model, year, engine, required specification and service conditions. Use the guidance above and the current corporate instructions for this exact product.
Signature Series 0W-40 Max-Duty Synthetic Diesel Oil
DZF · Match 0W-40 to your engine’s requirements. Review the service limits and exclusions above before planning an extended interval.
View Signature Series 0W-40 Max-Duty Synthetic Diesel Oil on AMSOIL
Open Technical Specifications on the corporate page for its current data sheet and safety information.
Confirm your model, year, engine, required specification and service conditions. Use the guidance above and the current corporate instructions for this exact product.
Signature Series 5W-30 Max-Duty Synthetic Diesel Oil
DHD · Match 5W-30 to your engine’s requirements. Review the service limits and exclusions above before planning an extended interval.
View Signature Series 5W-30 Max-Duty Synthetic Diesel Oil on AMSOIL
Open Technical Specifications on the corporate page for its current data sheet and safety information.
Confirm your model, year, engine, required specification and service conditions. Use the guidance above and the current corporate instructions for this exact product.
Signature Series 10W-30 Max-Duty Synthetic Diesel Oil
DTT · Match 10W-30 to your engine’s requirements. Review the service limits and exclusions above before planning an extended interval.
View Signature Series 10W-30 Max-Duty Synthetic Diesel Oil on AMSOIL
Open Technical Specifications on the corporate page for its current data sheet and safety information.
Confirm your model, year, engine, required specification and service conditions. Use the guidance above and the current corporate instructions for this exact product.
Personal product guidance
Need a hand choosing?
I’m Trey, the owner of Synthetic Oil Depot. Tell me what you drive or operate and I can help you review the product options for your next service.