Laboratory report on a sample of Castrol 'S' Gear Oil regarding its acid content and viscosity.
| Identifier | ExFiles\Box 32\3\ Scan117 | |
| Date | 1st March 1926 | |
| X1583 Hs. {Lord Ernest Hives - Chair} H14/EA1.3.26. Laboratory. Report No. L367. Re Sample of Castrol "S" Gear Oil submitted 25.2.26. This was found to be on the high side in acid content. We are of the opinion that this oil would increase in viscosity after a period in use, as after heating at 55°C for 2 hours, the oil, on cooling down would only just pour at 40°C. Hl. He. | ||
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).