Search results
API CK-4 oils are designed to provide enhanced protection against oil oxidation, viscosity loss due to shear, and oil aeration as well as protection against catalyst poisoning, particulate filter blocking, engine wear, piston deposits, degradation of low- and high-temperature properties, and soot-related
identify quality motor oils for gasoline- and diesel-powered vehicles. Oils displaying these marks meet performance requirements set by U.S. and international vehicle and engine manufacturers and the lubricant industry.
Chapter 1—Introduction and Fundamentals. 1.1 Lubricants in History. 1.2 Functions of a Lubricant. 1.3 Approval of Lubricants for Use. 1.4 Friction and Wear, Lubrication and Tribology. 1.4.1 The Mechanics of Friction. 1.4.2 Dry Friction. 1.4.3 Lubricated Sliding. 1.4.4 Boundary Lubrication.
It determines how thin or viscous an oil is and how it behaves depending on the ambient temperature. Therefore, the SAE (Society of Automotive Engineers) has published a system that defines reference temperatures, viscosity limits and class assignments for engine oils.
The Society of Automotive Engineers (SAE) set parameters for multigrade oils and viscosities base upon cold cranking viscosity, pumpability and cST measured at operating temperature. The table below shows these requirements. Permanent Vs Temporary Shear.
While the two numbers specify the SAE viscosity grade, the viscosity index shows the temperature related change of viscosity. This page gives an overview of the oil specifications, see also the measurement data of engine oils and gear oils over a wide temperature range.
GET MORE FROM YOUR MOTOROIL. Follow vehicle manufacturer’s oil change recommendations. This includes using recommended SAE oil viscosity and ILSAC or API performance standard. If you find it necessary to mix brands of oil, use the same viscosity grade and API service category to maintain performance.
