Low ash engine oil composition

Details Low ash engine oil composition Low ash engine oil composition

2007-02-22

2011-12-06

Caldarola, Glenn (Department: 1771)

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

Lubricants or separants for moving solid surfaces and...

Organic -co- compound

C508S287000, C508S391000

Reexamination Certificate

active

08071518

ABSTRACT:
The present invention provides a low ash engine oil composition which, despite the low ash content, has engine detergency which enables the composition to pass severe detergency tests for diesel engine oils. The engine oil composition contains 0.6 percent by mass or less of a sulfated ash and comprises a low ash engine oil composition with a sulfated ash content of 0.6 percent by mass or less, which comprises: a lubricating base oil with a % CAof 2 or less, a kinematic viscosity at 40° C. of 25 mm2/s or less and a viscosity index of 120 or greater; a viscosity index improver contained in such an amount that the viscosity index of the composition will be 160 or greater; (A) a metallic detergent with a metal ratio of 3 or less; and/or (B) a sulfur-free phosphorus compound.

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Extended European Search Report, dated Mar. 31, 2010 for EP Application No. 0771508.3, 3 pages.

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