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heavy oil

British  

noun

  1. a hydrocarbon mixture, heavier than water, distilled from coal tar

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Several other Asian countries that are heavy oil importers enacted energy-saving measures early on.

From MarketWatch Jun. 9, 2026

In Venezuela, where Chevron is the largest foreign investor, the company agreed this past week to an asset-swap deal that would boost its position in regions rich in viscous heavy oil that U.S. refineries favor.

From The Wall Street Journal Apr. 20, 2026

Monday’s fire was at one of its two diesel-treating units, which are designed to help the refinery convert the heavy oil into ultra-low-sulfur diesel while still meeting environmental specifications.

From Barron's Mar. 24, 2026

Rome has said the ship was carrying "significant quantities of gas, heavy oil, and diesel fuel".

From Barron's Mar. 15, 2026

It was a big, light room in a wing of the house, all the windows thrown open to air out the heavy oil and turpentine smells.

From "How the García Girls Lost Their Accents" by Julia Alvarez

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