Lube oils are vital to the operation of mechanical devices, explaining the continued growth in world demand. Lube base oils make-up 85 to 95% of lube oils and the remaining 5 to 15% are additives used to meet requirements for viscosity, stability and cold start properties. Lube oils face a growing and changing market. World lube base oil demand is shifting from Group I to Groups II and III as environmental and performance specifications become more and more restrictive.
