Group I Base Oils
Group 1 base oils are defined as having a viscosity index between 80 and 120, a sulphur-content higher than 0.03% and saturates are no more than 90% of the volume. They are made by the solvent extraction of distillate of crude oil. This relative easy method of processing makes the group comparably cheaper than the other, more refined grades. Because of the lower quality in refining, Group 1 base oils tend to be less in quality. Although they cannot be used for most applications, they still possess a good quality for the mundane applications. Coupled with their cost, this makes them the stock of many lubricants.
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Base Oils
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