Jatco Corporation

Infineum International Limited

Hiroshi Morisato

Hirokazu Saito

Makoto Maeda

Hahn Soo Kim

Takashi Aritake

Thomas Lin

Gou Katou

Yasuhiro Mogi

A booster additive concentrate may advantageously contain: (a) an anti-wear mixture of two or more phosphite/phosphate compounds and one or more ether/thioether compounds; (b) an ashless dispersant; (c) a calcium-containing detergent, such as an overbased calcium phenate; (d) &#x2265;2 friction modifiers, at least one of which comprises a polyalkylene polyamine succinimide derivative; (e) optionally a corrosion inhibitor; and (f) a lubricating oil basestock. Based on these additive components, the booster additive concentrate may exhibit specific contents of B/Ca/P and may contain minimal or substantially no additional antioxidants. Lubricant compositions can be made from the booster additive concentrates and a fresh/used lubricant oil composition 'diluent,' which can rejuvenate the diluent. Such lubricant compositions can have advantageous anti-shudder durability (ASD) lifetimes and other frictional properties. In particular, such concentrates/compositions can offer superior lubrication when used in vehicles with continuously variable transmissions (CVTs).

Rejuvenation and/or extension of the lifetime of frictional performance in transmission fluids

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Tokyo, Japan

Hiroshi Morisato