multi-grade engine oil and process for preparing a multi-grade engine oil

摘要

MULTI-GRADUATION ENGINE OIL AND PROCESS FOR PREPARING A MULTI-GRADUATION ENGINE OIL A multi-grade engine oil that meets the specifications of the SAE J300 requirements revised in June 2001 and a process to prepare it, said engine oil. motor comprising (a) from about 15 to about 94.5% by weight of a hydroisomerized distilled Fischer-Tropsch base oil defined by (i) a kinematic viscosity of between about 2.5 and about 8 cSt at 100 198 ° C. C, (ii) at least about 3 wt.% Of molecules having cycloparaffin functionality, and (iii) a ratio of weight percent of monocycloparaffin-functional molecules to weight percent of multicycloparaffin-functional molecules greater than about 15; (b) from about 0.5 to about 20% by weight of a pour point reducing base oil mixture component prepared from a hydromerized bed material having an average degree of branching in the molecules from about 5 and 9 alkyl branches per 100 carbon atoms and wherein no more than 10% by weight boils below about 482 ° C; and (c) from about 5 to about 30% by weight of a set of additives designed to meet ILSAC GF-3 specifications.