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Registered
Join Date: Feb 2006
Location: SF/Bay Area, CA
Posts: 26
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Hydrocrack is a slang term for hydroprocessing, the first part of a process used for making Group II or III base oils...vs. solvent-refined Group I base oils...
Chevron Lubricants - Base Oils - Isodewaxing
Here is a primer on what defines the various groups of base oils...
Chevron Lubricants - Base Oils - Meeting GF-4 Group I vs. Group II
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