Amoco Corporation

Steven Kennedy

Mack W Hunt

Lionel D Moore

David W Eggerding

A lubricating oil composition which includes partial esters of glycerol substantially free from glycerol are disclosed. The partial esters of glycerol are present in an amount of about 0.05 to about one percent by weight, and include less than about 1 weight percent of unreacted glycerol based on the total weight of glycerol esters and free glycerol present. Enhanced reduction in friction and improved stability are obtained.

Friction reducing lubricating oil composition

Disclosed is a lubricating oil composition for enhanced protection against silver wear in railway diesel engines which is formulated with no chlorinated hydrocarbons or with reduced levels thereof. The composition comprises a silver protective compound selected from the group consisting of (1) C.sub.8 to C.sub.22 fatty acid esters of C.sub.1 to C.sub.12 polyhydroxy alcohols or mixtures of such esters, wherein the alcohol portion of the ester has at least two unesterified hydroxyl groups; and (2) a mixture comprising the polyhydroxy compound of (1), above, and a chlorinated paraffin.

Railway lubricating oil

A metal-containing lubricant composition containing an overbased copper metal-containing compound is disclosed which improves high speed, high temperature operation of gasoline and diesel engines. The overbased copper metal-containing compound acts as a dispersant/detergent and oxidation and corrosion inhibitor and avoids the acceleration of wear rates typical of many copper compounds.

Metal-containing lubricant compositions

A lubricating oil composition for railway diesel engines is disclosed which comprises a lubricating oil base, an ashless dispersant, a mixture of overbased alkaline earth metal alkylphenolate and alkyl sulfonate compounds, and a polyhydroxy compound of up to 60 carbon atoms or a mixture of a polyhydroxy compound of up to 60 carbon atoms and a chlorinated hydrocarbon.

A lubricating oil composition for railway diesel engines is disclosed which comprises a lubricating oil base, an ashless dispersant, an overbased alkaline earth metal akylphenolate, an alkaline earth metal alkyl sulfonate, an overbased alkaline earth metal phenolate a polyhydroxy compound of up to 60 carbon atoms or a mixture of a polyhydroxy compound of up to 60 carbon atoms and a chlorinated hydrocarbon.

A metal-containing lubricant composition containing a copper overbased metal-containing composition is disclosed which improves high speed, high temperature operation of gasoline and diesel engines. The copper overbased metal-containing composition acts as a dispersant/detergent and oxidation and corrosion inhibitor.

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Naperville, IL, United States of America

Steven Kennedy