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).
Graph showing the viscosity curve for Castrol XL oil.
| Identifier | ExFiles\Box 145\1\ scan0066 | |
| Date | 11th February 1933 | |
| VISCOSITY CURVE - CASTROL XL LABORATORY 11.2.33. TEMPERATURE IN °C TIME OF EFFLUX IN SECONDS FROM REDWOOD No I VISCOMETER. | ||