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 Prices Patent Candle Co. Ltd. requesting oil viscosity data at low temperatures for cold engine starting.
| Identifier | ExFiles\Box 145\1\ scan0048 | |
| Date | 25th November 1933 | |
| Y 1488 Experimental Dept. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}3/KT. November 25th 1933. Messrs Prices Patent Candle Co.Ltd., Belmont Works, Battersea, London. S.W.11. 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 Motorine 'C' engine oil. We are interested in temperatures as low as -50C, 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', Aeroshell, and Essolube 40 & 50. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||