1923 W. Deeping ix. 85 A man was bending over one of the wings, pouring oil into the oil-sump.
1950 Aug. 121/1 Lubricating oil temperatures range from 250° F. in the oil sump on a warm day to 300° F. in the bearings.
2003 (Nexis) 14 June 2 Volvo also redesigned the oil sump for better oil supply to the engine.