Record of oil consumption for car 3 CP 30, tracking mileage and oil added over a three-month period.
| Identifier | ExFiles\Box 144\3\ scan0303 | |
| Date | 3rd May 1938 | |
| .CX. {Major Len W. Cox - Advertising Manager} Re: 3 CP 30 - Oil Consumption. - - - - - - - - - The sump of the above car was full at the speedo reading of 10075. 10429 1 qrt. 10868 2 qrts. 11327 1 qrt. 11582 1 qrt. 12113 1 qrt. 12469 1 qrt. Taken over a period of three months. Miles for period - 2394 to 1¾ gallons of oil - 1368 m.p.g. RC. {R. Childs} ✓ STAMPS: RECEIVED CX {Major Len W. Cox - Advertising Manager} 4 MAY POST MAY 14 | ||
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).