From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Oil consumption for car 3-AZ-38, detailing oil top-ups at various mileage points.
| Identifier | ExFiles\Box 144\3\ scan0259 | |
| Date | 4th October 1937 | |
| CX.{Major Len W. Cox - Advertising Manager} RC{R. Childs}7/L/4.10.37. Re: 3-AZ-38 - Oil Consumption. - - - - - - - - - - - The sump of the above car was full at the Speedo reading of 30290. 30770 1 qrt. 30847 1 qrt. 31010 1 qrt. 31134 1 qrt. 31416 1 qrt. Miles for month - 1126 to 1 gall. 1 quart of oil - 900 m.p.g. RC.{R. Childs}✓ | ||