John W Taracha

US Patent:

20060116297, Jun 1, 2006

Filed:

Dec 1, 2004

Appl. No.:

11/000658

Inventors:

Paul Basar - Brecksville OH, US
Steven Goodlive - Chardon OH, US
John Taracha - Painesville OH, US
William Abraham - Concord OH, US

Assignee:

The Lubrizol Corporation - Wickliffe OH

International Classification:

C10M 141/06
C10M 141/10

US Classification:

508287000, 508198000, 508371000, 508372000, 508375000, 508391000, 508460000, 508586000

Abstract:

An internal combustion engine can be cleaned of sludge, deposits, or wear debris, by supplying to lubricated surfaces of said engine a composition having a kinematic viscosity of 1 to 10 mm/s at 100 C. comprising oil having at least 15% aromatics by ASTM D-2007; at least 2.5 weight percent of a nitrogen-containing dispersant; at least 0.6 weight percent of an overbased metal detergent; and at least about 0.5 weight percent of a metal salt of a phosphorus acid, circulating the composition through the engine and removing the composition from the engine.