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).
Instructions for engine oil changes and crankcase maintenance.
| Identifier | ExFiles\Box 74\3\ scan0247 | |
| Date | 19th January 1922 | |
| contd. -2- R1/M19.1.22. in the crankcase. We could sacrifice some of this virtue if necessary. In a new engine, with grit, fluff, etc, in the crank-case, the oil should be drained out frequently at first, put in a cock while in our hands, let out the oil every few hundred miles until the engine settles down. Do not add to the dirty oil in the crankcase ever, but when low let it out, and refil with clean. This should be our strict orders to users, about every 1000 miles. On the 40/50 we use so little oil that it gets very poor and dirty unless drained and washed out, preferably, with paraffin. R.{Sir Henry Royce} (upside down text at bottom) R.R. 235b (50T) ('S) H.S.(I.OS) 986. 19-2-21. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3009 | ||