Lubricant classification standards? 1. Classification by viscosity: – SAE (Society of Automobile Engineers, Automobile Engineers Association): – ISO (International Standards Organization). – NLGI (National Lubrication Grease Institute, USA National Petroleum Institute) 2. Sort by API (American Petroleum Institute). The quality …

What is additive? Additives are organic, metallic or inorganic compounds, even chemical elements added to a lubricant, to enhance or deliver the desired properties. Types of additives: – Additives antifreeze. – Additives viscosity index (AVI, AM, VII). – Cleaning additives …