燃油 is read as ねんゆ (nenyu) and means fuel oil.
ねんゆ
nenyu
ねんりょうゆ
fuel oil
ねんゆさーちゃーじ
fuel surcharge
ねんゆとくべつふかうんちん
もやす
to burn
ねんりょう
fuel
ねんぴ
fuel consumption
ねんしょう
burning
もえる
もえあがる
to flare up
もえひろがる
to spread (of flames)
もえうつる
(of fire) to spread
ねんりょうしゅうごうたい
fuel assembly (nuclear reactor)