SPECIFICATIONS EXPLAINED
Oil and fluid specifications, explained.
What the codes on a manual or a bottle mean: API and ILSAC engine oil categories, OEM approvals, JASO and NMMA ratings, ISO viscosity grades, NLGI grease grades, brake fluid DOT ratings, and more. Match the exact specification your equipment maker lists.
Engine oil standards
Oil properties and lab tests
Automaker and engine-builder approvals
Motorcycle, two-stroke and marine oil standards
Gear oil and transmission fluid standards
Hydraulic oil standards
Grease standards and types
Brake fluid and coolant standards
Fuel standards
Food-grade lubricant standards
These pages explain what each standard covers. A specification on a product label is confirmed by the current product data and, where applicable, the issuing body’s license or approval list; always follow your vehicle or equipment manual.