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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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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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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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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Patent Timeline
Login to View More 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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