8/16/2023 0 Comments 8 cst viscosity![]() ![]() 4, 6 and 12 cSt Group IIs and a 4 cSt Group II+. We also offer a 3 cSt oil that is Group II. We offer three Group III grades: a 4 centiStoke, a 6 cSt and an 8 cSt. Six grades: 2, 3, 4, 5, 6 and 8 centiStokes. Group I and II oils have VIs between 80 and 119, while VIs of Group IIIs must be at least 120. ![]() Group I oils contain more than 0.03 percent sulfur and/or less than 90 percent saturates, while groups II and III must contain no more than 0.03 percent sulfur and at least 90 percent saturates. Following are their comments.ĪPI defines groups I, II and III according to viscosity indices and sulfur and saturates levels. To help flesh out the differences between the two grades, LubesnGreases submitted a series of six questions to four companies – Group III suppliers Neste and SK Lubricants, Chevron and Puralube, Europes largest rerefiner and a manufacturer of Group II. Recently, however, Chevron has made a big push to promote imported Group II, and rerefiners now offer a significant amount of the same grade. ![]() Europe, on the other hand, has historically had very little Group II capacity, making Group III the dominant alternative to Group I. Blenders in North America and Japan have had years of practice choosing between Group II and III, thanks to both grades being readily available in the market. A number of factors go into base stock decisions – the type of lubricants to be made, their performance properties, raw material cost, storage tank availability and proximity of suppliers. ![]()
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