Lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsJunichi Deshimaru, Yutaka Takakura
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Abstract
A lubricating oil composition which comprises a lubricating base oil and a sulfonate, phenate or salicylate of an alkaline earth metal and has a friction coefficient between metals of 0.12 or higher at −20° C. as measured in accordance with a block-on-disk test. The friction coefficient between metals in the use of a metal belt can be kept high within a wide range of temperature from low temperatures to high temperatures. In particular, the lubricating oil exhibits a high performance of μ=0.12 or higher at a low temperature of −20° C. in accordance with a block-on-disk test.
Claims8
A lubricating oil composition which comprises a lubricating base oil and a sulfonate, phenate or salicylate of an alkaline earth metal and has a friction coefficient between metals of 0.12 or higher at −20° C. as measured in accordance with a block-on-disk test.
Dependencies are inferred from the claim text.