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 vehicle maintenance, covering the car and draining oil.
| Identifier | ExFiles\Box 144\1\ scan0308 | |
| Date | 12th March 1940 guessed | |
| -2- 12. Cover the whole car with a light dust sheet, first extending the hood in the case of an open car. Oil in engine, gearbox and rear axle should be drained off and replaced with mineral oil, such as Mobiloil BB; | ||