Lubricating oil composition for diesel engines
AssigneeShell Oil Company
InventorsMao UEDA, Kiyoshi HANYUDA
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Abstract
The invention provides a lubricating oil composition for diesel engines which contains a GTL base oil with a kinematic viscosity at 100° C. of 4.5 to 5.5 mm2/s, a comblike PMA (polymethacrylate) based viscosity index improver and a boron-containing dispersant and/or boron-containing detergent, the total content of the boron-containing dispersant and/or boron-containing detergent in terms of conversion to boron content relative to the total amount of the composition being not less than 0.025 mass %, and which satisfies 0W-30 or 5W-30 in the SAE J300 standard.
Claims3
A lubricating oil composition for diesel engines characterised in that it contains:
- a) a GTL base oil with a kinematic viscosity at 100° C. of 4.5 to 5.5 mm2/s,
- b) a comb-like PMA (polymethacrylate) based viscosity index improver, and
- c) a boron-containing dispersant and/or boron-containing detergent, wherein the total amount of boron-containing dispersant and/or boron-containing detergent incorporated in terms of conversion to boron content relative to the total amount of the composition being not less than 0.025 mass %, and
- wherein it satisfies 0W-30 or 5W-30 in the SAE J300 standard.
Dependencies are inferred from the claim text.