重 油(じゅうゆ)

じゅうゆ

noun

heavy oil; fuel oil

1. heavy oil; fuel oil; bunker oil

A dark, viscous petroleum product used as fuel for ships, power plants, and industrial boilers. It is the residue left after lighter fractions like gasoline and diesel have been distilled from crude oil.

この船(ふね)は重油(じゅうゆ)で動(うご)く。

This ship runs on heavy oil.

重油(じゅうゆ)の価格(かかく)が上昇(じょうしょう)している。

The price of heavy oil is rising.

タンカーから重油(じゅうゆ)が流出(りゅうしゅつ)し、海(うみ)が汚染(おせん)された。

Heavy oil leaked from the tanker and the sea was contaminated.

Composed of 重(じゅう) (heavy) + 油(ゆ) (oil). Called "heavy" because it is denser and more viscous than lighter petroleum products like gasoline (揮発油(きはつゆ)) or 軽油(けいゆ) (diesel). Classified into types A, B, and C based on viscosity.

Common collocations

重油(じゅうゆ)流出(りゅうしゅつ): heavy oil spill
重油(じゅうゆ)ボイラー: heavy oil boiler
重油(じゅうゆ)価格(かかく): heavy oil price
C重油(じゅうゆ): C-grade heavy oil (the thickest type)

Related words

軽油(けいゆ): diesel fuel (lighter grade)
灯油(とうゆ): kerosene
原油(げんゆ): crude oil
石油(せきゆ): petroleum (general term)

Related Words

Related: 軽油(けいゆ) (diesel fuel)

Related: 灯油(とうゆ) (kerosene)

Related: 原油(げんゆ) (crude oil)

Related: 石油(せきゆ) (petroleum)

Compare: 燃料油 (fuel oil)

general

Added 2026.4.4 1:11 · Revised 2026.9.2 13:02

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