Railway lubricating oil
AssigneeAmoco Corporation
InventorSteven Kennedy
Life of this patent
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Abstract
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.
Claims6
A method for reducing silver wear in marine and railway diesel engines which comprises the step of lubricating the internal portion thereof with a lubricating oil composition having a TBN of at least 5 and comprising 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.
Dependencies are inferred from the claim text.