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).
Query regarding the correct type and make of oil for the 20HP Chassis central lubrication system and axles.
| Identifier | ExFiles\Box 27\1\ Scan190 | |
| Date | 30th April 1929 | |
| Hs.{Lord Ernest Hives - Chair} 43806. Mx{John H Maddocks - Chief Proving Officer}6/T30.4.29. re 20HP Chassis With reference to the 20HP Chassis now coming on test with the central lubrication system. Will you please let us know the type, and make of oil that we are to use in the oil tank on the dash, and whether the same oil is to be used on the front and rear axles. Mx{John H Maddocks - Chief Proving Officer} [Signature] | ||