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).
Laboratory analysis results for Price's Gas Engine Oil and Wakefield's Castrol.
| Identifier | ExFiles\Box 76\3\ scan0097 | |
| Date | 26th June 1919 | |
| R.R. 235 A (100 T) (S.F. 575. 16-1-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. BY.{R.W. Bailey - Chief Engineer} c to Works. H18/EB27619. Laboratory. Re Price's Gas Engine Oil received 26/6/19. With reference to your memo BY12/P26,6,19, the following results were obtained:- Viscosity Temperature. 50ccs. 55ccs. (Redwood). 130 F.{Mr Friese} 102 secs. 113 secs. 212 F.{Mr Friese} 41 secs. 46 secs. Flash point (open) 188 C. Lower than formerly Acidity. free .098% Oleic Acid. Analysis. 7.2 Fatty oil. 92.0 Mineral Oil. Specific Gravity .888 Re Wakefield's Castrol received 26/6/19. Viscosity Temperature. 50ccs. 55ccs. (Redwood). 130 F 235 secs. 260 secs. 212 F 71 secs. 79 secs. Flash point (open). 225 C. Lower than formerly. Acidity. free .70% Oleic Acid. high Analysis. Castor 77.2 Fatty Oil. lower than formerly 22.5 Mineral Oil. high Specific Gravity .962 HDB Both these oils are thinner than formerly probably owing to the use of a thinner mineral oil constituent. | ||