AMSOIL Resources & Guides
Practical maintenance and product-selection guidance. Articles link to official technical sources and distinguish vehicle requirements from purchasing-program information.
How to Select Synthetic Motor Oil: Viscosity and Exact Application
Read the two parts of a viscosity grade, identify the exact application, and check AMSOIL lookup recommendations against the specific product's listed applications.
CK-4 vs. FA-4 Diesel Oil: What Work-Truck Owners Should Check
CK-4 and FA-4 are not interchangeable. Learn how to compare your work truck’s engine requirements, viscosity and oil specifications before choosing an AMSOIL product.
A Small-Fleet Oil Maintenance Checklist for Texas Businesses
A practical checklist for Texas small fleets: verify each vehicle’s oil requirements, follow OEM maintenance reminders, document oil-and-filter service and use oil analysis with a clear purpose.
AMSOIL Commercial Account vs. Preferred Customer: Which Is Right for Your Business?
AMSOIL Commercial Accounts and Preferred Customer memberships are built for different buyers. Compare who qualifies, how pricing and shipping work, and which option fits your equipment and purchasing needs.