The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2016
Filed:
Feb. 13, 2015
Chevron Oronite Technology B.v., Rotterdam, NL;
Richard Hogendoorn, Prinsenbeek, NL;
Bertus Bernardus Hoogendam, Rotterdam, NL;
Chevron Oronite Technology B.V., Rotterdam, NL;
Abstract
Disclosed herein is lubricating oil composition for providing enhanced piston cleanliness in an internal combustion engine. The lubricating oil composition include (a) from about 50 to about 65 wt. %, based on the total weight of the lubricating oil composition, of a first base oil component having a Kv at 100° C. of about 3.5 to about 4.5 cSt; (b) from about 10 to about 30 wt. %, based on the total weight of the lubricating oil composition, of a second base oil component having a Kv at 100° C. of about 5.5 to about 6.5 cSt; (c) about 1.50 wt. % to about 10 wt. %, based on the total weight of the lubricating oil composition, of at least one Mannich reaction product as disclosed herein; and (d) at least one ashless dispersant other than component (c); wherein the lubricating oil composition has a sulfur content of less than or equal to about 0.30 wt. %, a phosphorus content of less than or equal to about 0.09 wt. %, and a sulfated ash content of less than or equal to about 1.60 wt. % as determined by ASTM D 874, based on the total weight of the lubricating oil composition; and further wherein the lubricating oil composition is a SAE 0W multi-grade lubricating oil composition; with the proviso that when the lubricating oil composition has a sulfated ash content of less than or equal to 0.60 wt. %, based on the total weight the lubricating oil composition, the Mannich reaction product is present in at least about 3.0 wt. %, based on the total weight of the lubricating oil composition.