Lubricating oil composition containing two molybdenum additives

Details Lubricating oil composition containing two molybdenum additives Lubricating oil composition containing two molybdenum additives

1999-10-25

2000-06-13

Howard, Jacqueline V.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Nitrogen and heavy metal, or nitrogen and aluminum, in the...

508365, 508372, 508375, 508377, 508379, C10M14112

Patent

active

060749938

ABSTRACT:
A lubricating oil composition exhibiting improved fuel economy and wet clutch friction properties, which comprises: (a) an oil of lubricating viscosity; (b) at least one calcium or magnesium overbased detergent; (c) an oil soluble dimeric molybdenum compound; (d) an oil soluble organic trinuclear molybdenum compound; (e) at least one zinc dihydrocarbyldithiophosphate compound, wherein the composition has a TBN of at least 3.6 from the calcium or magnesium overbased detergent, a NOACK volatility of about 15 wt. % or less, molybdenum in an amount up to about 350 ppm from the trinuclear molybdenum compound, molybdenum in an amount up to 2,000 ppm from the dimeric molybdenum compound, and phosphorus in an amount up to about 0.1 wt. % from a zinc dihydrocarbyldithiophosphate compound.

REFERENCES:
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patent: 5665684 (1997-09-01), Arai et al.
patent: 5672572 (1997-09-01), Arai et al.
patent: 5888945 (1999-03-01), Stiefel et al.
patent: 5895779 (1999-04-01), Boffa
patent: 5906968 (1999-05-01), Mc Connachie et al.
patent: 6010987 (2000-01-01), Stiefel et al.

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