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US 5,631,212 AGranted
Engine oil
AssigneeExxon Research & Engineering Co.
InventorElisavet P. Vrahopoulou
Life of this patent
Estimating the term…
Abstract
A lubricating oil composition having improved fuel economy, wear resistance and antioxidancy properties which comprise a lubricating oil basestock, an oil-soluble copper salt, an oil-soluble molybdenum salt, a Group II metal salicylate and a borated polyalkenyl succinimide.
Claims9
A lubricating oil composition having improved fuel economy, wear resistance and antioxidancy properties which comprises:
- (a) a lubricating oil base stock;
- (b) from 0.002 to 1.0 wt %, based on oil composition, of a copper salt,
- (c) from 0.004 to 4 wt %, based on oil composition, of an oil-soluble molybdenum salt of an organic acid of C.sub.4 -C.sub.30 saturated or unsaturated carboxylic acid;
- (d) from 50 to 4000 ppmw, based on oil composition, of a Group II metal atoms present as metal salicylate;
- and
- (e) from 2 to 16 wt %, based on oil composition, of a borated polyalkenyl succinimide wherein the amount of boron in the oil is at least 900 ppm, based on oil.
3 more elements
Dependencies are inferred from the claim text.