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).
Letter to the Vacuum Oil Co. Ltd. requesting viscosity curve data for Mobiloil 'D' at low temperatures.
| Identifier | ExFiles\Box 145\1\ scan0046 | |
| Date | 25th November 1933 | |
| K.58 Experimental Dept. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}5/KT. November 25th 1933. The Vacuum Oil Co. Ltd., Caxton House, Westminster, London. S.W.1. Dear Sirs, Re. Oil Viscosity. In connection with cold engine starting, we should be glad if you can let us have a viscosity curve for your Mobiloil 'D' engine oil. We are interested in temperatures as low as -5°C. if you can give us any information at this low temperature we should be grateful; it would be helpful if you could show us how your oil compares for viscosity with such oils as Castrol XL, XXL, Motorine 'C', Aeroshell, and Essolube 40 & 50. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||