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).
The oil consumption of car 3 CM 87 over a three-month period.
| Identifier | ExFiles\Box 144\3\ scan0304 | |
| Date | 3rd May 1938 | |
| CX.{Major Len W. Cox - Advertising Manager} RC{R. Childs}6/L/3.5.38. RECEIVED Re: 3 CM 87 - Oil Consumption. The sump of the above car was full at the speedo reading of 408. 678 2 qrts. Taken over a period of three 1651 1 1/4 galls. months. 2124 3 pts. 4314 5 pts. 4412 1qrt. 5537 1 qrt. 5712 1 qrt. Miles for period - 5304 to 3 1/2 gallons - 1516 m.p.g. RC.{R. Childs}✓ POST Recd | ||