sump oil

noun

Lubricating oil contained in the sump of an engine; the waste oil drained from the sump at the time of an oil change.

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Meanings

nounsump oil (uncountable)
  1. uncountableLubricating oil contained in the sump of an engine; the waste oil drained from the sump at the time of an oil change.

    Dirty sump oil is pumped out along a waste oil pipe line to storage tanks by the boiler house, to be used as boiler fuel.

    1960 December, “New G.E. Line diesel loco maintenance depot at Stratford”, in Trains Illustrated, page 767
Cite this entry
APA

sump oil. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/sump%20oil

MLA

“sump oil.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sump%20oil. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “sump oil,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/sump%20oil.

Source: sump oil on Wiktionary, CC BY-SA 4.0.