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 figures for B-2-LS and B-4-LS models.
| Identifier | ExFiles\Box 144\3\ scan0311 | |
| Date | 10th August 1938 | |
| C.T.S. S/W. Rm.{William Robotham - Chief Engineer} Oil Consumption. Cx{Major Len W. Cox - Advertising Manager}1/KW10.8.38 I attach hereto figures up to the end of July in respect of B-2-LS and B-4-LS . KW. for Cx.{Major Len W. Cox - Advertising Manager} RC{R. Childs}4/L9.8.38. RC{R. Childs}5/L9.8.38 | ||