What is Lubricating Oil ?

Lubricating oil is produced by vacuum distillation of the heavy residue from the primary distillation of crude oil. It is separated into a number of fractions which we can call light, medium and heavy. These fractions are the base oils or feed stocks, for the production of finished lubricating oils. Base oils in certain cases can be used as lubricants without further treatment. If required for special applications they should need further treatment to improve their properties, as may be blended together to give lubricating oils of read more...