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Lubricating oil composition and use thereof

a technology of lubricating oil and composition, applied in the field of lubricating oil composition, can solve the problems of adverse effects of after-treatment devices of internal combustion engines and fuel combustion engines

Inactive Publication Date: 2006-12-14
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfated ash, sulfur and phosphorus concentrations of lubricating oil compositions conventionally used in internal combustion engines may have adverse effects on such after-treatment devices.

Method used

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  • Lubricating oil composition and use thereof

Examples

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Effect test

example 1 and example 2

[0071] An SAE 10W-30 lubricating oil composition (Example 1) and an SAE 15W-40 lubricating oil composition (Example 2) as described in Table 1 were prepared containing formulation containing a compounds a) to f).

[0072] The lubricating oil composition of Example 1 and Example 2 had a sulfated ash content, a phosphorus content and a sulfur content of as provided in Table 1 above.

[0073] The lubricating oil compositions were tested as described above and the results are shown in Table 2.

TABLE 2Example 1Example 2Oxidation Induction Time (@ 210° C.)13 min.14 min.

[0074] As can be seen from Table 2, the lubricating oil composition has good oxidation stability for an engine oil.

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PUM

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Abstract

A lubricating oil composition having a sulfur content of from 0.3 to 0.5 wt. %, a phosphorus content of from 0.10 to 0.13 wt. % and a sulfated ash content of from 0.1 to 1.1 wt. %, based on the total weight of the lubricating oil composition is provided. The lubricating oil composition contains at least one Group II mineral base oil; at least one alkali and / or alkaline earth metal alkyl salicylate; an ashless dispersant; at least one zinc didithiophosphate; and at least one aminic ashless antioxidant and at least one phenolic ashless antioxidant.

Description

[0001] The present application claims the benefit of pending U.S. Provisional Patent Application Ser. No. 60 / 682,360 filed May 18, 2005, the entire disclosure of which is hereby incorporated by reference.FIELD OF THE INVENTION [0002] The present invention relates to a lubricating oil composition and its use. BACKGROUND OF THE INVENTION [0003] Due to environmental considerations, exhaust after-treatment devices are often fitted to vehicles in order to reduce particulate matter and NOx emissions therefrom. [0004] However, the sulfated ash, sulfur and phosphorus concentrations of lubricating oil compositions conventionally used in internal combustion engines may have adverse effects on such after-treatment devices. [0005] Sulfated ash is the total weight percent of ash in a lubricating oil composition. The sulfated ash content in a lubricating oil composition is related to the total metal content therein. Sulfated ash may be conveniently measured according to ASTM D874. [0006] In view ...

Claims

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Application Information

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IPC IPC(8): C10L1/22
CPCC10M169/044C10M2203/1006C10N2240/10C10M2205/04C10M2207/026C10M2207/144C10M2207/262C10M2215/064C10M2215/28C10M2223/045C10N2210/01C10N2210/02C10N2230/02C10N2230/04C10N2230/10C10N2230/42C10N2230/43C10N2230/45C10M2205/06C10N2010/02C10N2010/04C10N2030/02C10N2030/04C10N2030/10C10N2030/42C10N2030/43C10N2030/45C10N2040/25
Inventor COLBOURNE, DAVIDURBANAK, MATTHEW ROBERTSELBY, KEITH
Owner SHELL OIL CO
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