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).
Table of viscosity values for three types of Motorine oil at various temperatures.
| Identifier | ExFiles\Box 144\1\ scan0205 | |
| Date | 3rd February 1933 guessed | |
| C o p y VISCOSITY @ 70°F.{Mr Friese} 140°F.{Mr Friese} 200°F MOTORINE C 2330" 230" 73" MOTORINE C DE LUXE 2265" 240" 80" MOTORINE B DE LUXE 3230" 340" 105" | ||