API donut

Meaning

Noun

• 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).

Related

Similar words

• API Service Symbol
• API service symbol

Origin

• API + donut; from American Petroleum Institute, and its shape.