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 from the Experimental Dept. requesting oil viscosity data from Shell-Mex & B.P. Ltd.
| Identifier | ExFiles\Box 145\1\ scan0045 | |
| Date | 25th November 1933 | |
| V2869 Experimental Dept. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}6/KT. November 25th 1933. Messrs Shell-Mex & B.P. Ltd., P.O. Box No. 148, Shell-Mex House, Victoria Embankment, London. W.C.2. 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 Aeroshell 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, Mobiloil 'D', Motorine 'C', and Essolube 40 & 50. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||