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).
Importance of using the correct engine oil to prevent wear on pistons, rings, and bearings.
| Identifier | ExFiles\Box 76\4\ scan0168 | |
| Date | 22th August 1919 | |
| Contd. -2- R1/G22.8.19. use these on standard cars (of which the makers do not recommend a speciak oil) in the order given. I have written on this subject to some length as I consider the matter is of the utmost importance for the reputation of the good wearing qualities of our car, and feel sure that some of the oil that owners are likely to receive from garages may cause excessive wear of both piston, piston rings and plain bearings about the engine. R.{Sir Henry Royce} [Upside down text] R R 235 B (200 T) (S F) 673. 22-5-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2376 | ||