baseöljyjä
Base oils, also known as base stocks, are the fundamental components of lubricants. They make up the largest percentage of a finished lubricant, typically ranging from 70% to over 99%. The performance of a lubricant is heavily dependent on the properties of its base oil. Base oils are broadly categorized into several groups, primarily based on their refining process and chemical composition.
Group I base oils are solvent-refined mineral oils. They are the oldest and generally least expensive type
Group II base oils are produced through more severe refining processes, often involving hydrocracking. This results
Group III base oils undergo even more extensive refining, typically through hydroisomerization or severe hydrocracking. These
Group IV base oils are exclusively polyalphaolefins (PAOs). PAOs are fully synthetic hydrocarbons manufactured through polymerization.
Group V encompasses all other base oils not included in Groups I-IV. This category includes esters, silicones,