Last Updated
：2025/12/06
API donut
Noun
US
Japanese Meaning
（米国自動車分野）米国規格に基づいた自動車用オイル缶に記載される情報表。中央の円状部分に粘度（例：10W50）が示され、上部の環状部分にオイルの種類（例：SP）が表示される。
（ plural ）
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(US, automotive) An information table found on cans of motor oil, conforming to U.S. standards, which indicates the weight (viscosity) and type of oil. The central circle provides the oil viscosity rating (ie. 10W50), while the upper annulus section provides the oil type (ie. SP).
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API donut
Before topping off your engine, always check the API donut on the oil can to verify the viscosity and the SP service rating.
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Before topping off your engine, always check the API donut on the oil can to verify the viscosity and the SP service rating.
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