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 report for car B 4 LS, comparing an old engine with a newly fitted one.
| Identifier | ExFiles\Box 144\3\ scan0307 | |
| Date | 9th August 1938 | |
| CX.{Major Len W. Cox - Advertising Manager} RC{R. Childs}4/L/9.8.38. Re: B 4 LS - Oil Consumption. - - - - - - - - - - The sump of the above car was full at the speedo reading of 7063. Taken over a period of 3 months. Old Engine. 7596 1 qrt.) 7740 1 qrt.) 8269 1 qrt.) 8673 3 pts.) 9203 1 qrt.) 9676 1 qrt.) 11885 7 pts.) 12220 1 qrt.) 12518 1 qrt.) New engine fitted in July, 1938. first consumption figures denote old engine. Miles - 5455 to 3 galls of oil - 1813 m.p.g. Full at 12797 13033 1 qrt. New engine figures - Miles - 236 to 1 quart of oil - 944 m.p.g. RC.{R. Childs}✓ | ||