Viscosity index is a change in viscosity with temperature: Viscosity decreases rapidly with increasing temperature Ex: Parafinique mineral oil, viscosity decreased 7 times when increasing T from 60 to 120 degrees C. The decrease in viscosity as the temperature increases …

Technically: – High oxidation stability – Features high thermal viscosity – Evaporation is lower – Lower freezing temperature – Lower coefficient of friction – Non-toxic Application: – Higher working temperature – Wider working range – Reduce oil consumption – Works …

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 …