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black oil

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black oil

[¦blak ′ȯil]
(materials)
Low-grade, black petroleum oil used to lubricate slow-moving or rough-surfaced machinery where high-grade lubricants are impractical or too expensive.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
In Black Oil, the industry declined by 1.6 percent, whereas the White Oil industry declined by 1.9 percent.
PSO posts improved performance despite financial constraints
Despite the companys market share in the Black Oil and White Oil segments stood at 82.2 percent and 54.7 percent, respectively contributing to an overall market share of 68.4 percent, the official said.
Pakistan State Oil (PSO) registers highest gasoline sales
In the period under review, industry's volumes for Black Oil reduced by 8%, whereas, White Oil grew by 4% reflecting an increase in PMG consumption of 22% while a decline of 1% was recorded in HSD demand.
PSO becomes trillion rupees company
Despite financial challenges and economic slow down, PSO maintained its leadership in the White and Black Oil market segments with market shares of 55.3pc and 88.2pc respectively.
PSO earnings touch Rs9.05b
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