engine oil

English

Noun

engine oil (countable and uncountable, plural engine oils)

1. Synonym of motor oil
   • 2023 March 22, “Network News: Class 175s withdrawn for safety checks after fires”, in RAIL, number 979, page 13:

     The rest were undergoing special underbody cleaning safety checks at TfW depots, after speculation that the cause of the incidents may have been a build-up of engine oil and combustible material such as fallen leaves and general detritus.