Lubricating oil with improved wear properties
AssigneeChevron U.S.A. Inc.
InventorsWillem VAN DAM, James McGEEHAN, Trevor MILLER, James BOOTH
Life of this patent
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Abstract
Provided is a lubricating oil composition for internal combustion engines comprising at least one hydrocarbon base stock which is determined to exhibit a 100° C. PVC/40° C. PVC ratio approaching one or greater, and one or more lubricating additives. Also provided is a method for preparing such a composition, which includes determining the 100° C. PVC/40° C. PVC ratio of a hydrocarbon base stock oil, and selecting a hydrocarbon base stock oil which exhibits a 100° C. PVC/40° C. PVC ratio approaching one. One or more lubricating additives are then added to the selected base stock oil.
Claims26
A lubricating oil composition for internal combustion engines comprising:
- a) at least one hydrocarbon base stock which is selected once it is determined to exhibit a 100° C. PVC/40° C. PVC ratio approaching one or greater;
- and
- b) one or more lubricating additives.
Dependencies are inferred from the claim text.