Referencing a list of oil types used in present Rolls-Royce and Bentley Trials Cars.
| Identifier | ExFiles\Box 144\3\ scan0143 | |
| Date | 14th January 1937 | |
| S/W. {Sales / Derby Works} Rm. {William Robotham - Chief Engineer} 1220 SWDL {Len H. Swindell} PLEASE NOTE SWDL {Len H. Swindell} Wtles Oil Consumption Rm. {William Robotham - Chief Engineer} Cx {Major Len W. Cox - Advertising Manager} 5/KW14.1.37. Reference Rm {William Robotham - Chief Engineer} 7/Rll.1.37, here is a list of present Trials Cars both Rolls-Royce and Bentley showing what oil is being used in the engines. Att: RC {R. Childs} 5/L/13.1.37. Cx. {Major Len W. Cox - Advertising Manager} dwd | ||
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).