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).
Record of oil consumption for car B 39 JY, detailing top-ups at various mileages and calculating the overall m.p.g.
| Identifier | ExFiles\Box 144\3\ scan0237 | |
| Date | 2nd July 1937 | |
| C.X. 1220 RC{R. Childs}1/L/2.7.37. Re: B 39 JY - Oil Consumption. - - - - - - - - - - - - 2623. The sump of the above car was full at the speedo reading of 3135 1 pt. 3524 1 qrt. 3870 1 qrt. 4007 1 pt. 4169 1 qrt. 4392 1 pt. Miles for month - 1769 to 1 gallon, 1 pint of oil - 1568 m.p.g. [Stamp] POST. Received 3 JUL 1937 RC.{R. Childs}✓ | ||