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Low viscosity engine oil with superior engine wear protection

a low viscosity, engine oil technology, applied in the direction of lubricant composition, liquid carbonaceous fuels, additives, etc., can solve the problems of increased engine wear, inability to provide acceptable passenger vehicle diesel engine durability performance, and diesel engines are more prone to filter plugging, so as to improve fuel economy and improve anti-wear performance.

Inactive Publication Date: 2015-04-23
EXXON RES & ENG CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a new engine oil lubricant that can improve fuel efficiency and decrease wear on engines. The lubricant contains low amounts of sulfated ash and has a specific viscosity range. This new lubricant can be added to engines to improve their performance.

Problems solved by technology

In order to improve lubricant fuel economy performance, reduction of viscosity is typically the best path; however, present day lubricant oils with a high temperature high-shear (HTHS) viscosity of less than 2.9 cP at 150° C. would not be expected to be able to provide acceptable passenger vehicle diesel engine durability performance.
As this happens, the viscosity of the oil decreases which may lead to increased engine wear.
Diesel engines are more prone to filter plugging due to high sulfated ash content of the lubricant.

Method used

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  • Low viscosity engine oil with superior engine wear protection

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[0076]Lubricating oil compositions according to the invention were prepared using a blend of PAO, ester and Group III base oils.

[0077]In addition to a metal detergent, viscosity index improver, and ZDDP, the composition included borated and non-borated ashless dispersant, phenolic and aminic antioxidants, defoamant, pour point depressant, friction modifier and seal swelling agent.

[0078]Representative formulations are given in Table 2.

TABLE 2Invention Invention Comp.Comp.Comp.Comp.Comp.FormulationEx 1Ex 2Ex. 3Ex. 4Ex. 5Ex. 6Ex. 7Viscosity Grade0W-200W-200W-300W-205W-305W-305W-30Component, wt %Ca Salicylate and / or Mg2.21.82.252.333.523.522.33Sulfonate Detergent (total)Ca Salicylate Detergent2.21.32.251.53.523.521.5Mg Sulfonate Detergent0.50.830.83Friction Modifier (total)0.150.150.150.480.730.770.4Friction Modifier 0.150.150.150.10.180.220.1(Organo-molybdenum)Friction Modifier 0.380.550.550.3(ashless organic)Viscosity Index Improver(solid polymer content)Styrene-isoprene0.120.12block ...

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Abstract

An engine oil lubricant composition comprising a major amount of base oil and an effective amount of a zinc dialkyl dithio phosphate, a polymeric viscosity index improver and a mixture of alkaline earth metal detergents provides improved fuel efficiency while providing excellent wear in an engine.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This is a Continuation-In-Part Application which claims priority to non-provisional application U.S. Ser. No. 13 / 533,259 filed on Jun. 26, 2012, which claims priority to U.S. Provisional Application Ser. No. 61 / 502,673 filed Jun. 29, 2011, both of which are herein incorporated by reference in their entirety.FIELD OF THE INVENTION[0002]This invention relates to a lubricant oil composition having a sulfated ash content of about 0.6 wt % and a high-temperature high-shear (HTHS) viscosity of lower than 2.9 cP at 150° C. that provides excellent engine wear protection and improved fuel efficiency and use thereof.BACKGROUND OF THE INVENTION[0003]Fuel efficiency requirements for passenger vehicles are becoming increasingly more stringent. New legislation in the United States and European Union within the past few years has set fuel economy and emissions targets not readily achievable with today's vehicle and lubricant technology. In order to impro...

Claims

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Application Information

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IPC IPC(8): C10M161/00
CPCC10M161/00C10M171/02C10M2203/1025C10M2205/022C10M2205/0285C10M2205/04C10M2205/06C10M2207/262C10M2207/2805C10M2215/28C10M2219/046C10M2223/045C10M167/00C10N2020/04C10N2020/02C10N2030/40C10N2030/43C10N2030/45C10N2030/54C10N2030/68C10N2030/06C10N2040/253C10N2040/255C10N2040/25C10M2205/024C10N2010/04C10N2020/073C10N2060/02C10N2060/14
Inventor LYON, KRISTEN A.KELLY, KEVIN J.MAXWELL, WILLIAM L.DECKMAN, DOUGLAS E.
Owner EXXON RES & ENG CO
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