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).
Recommendation to address cold starting difficulties in the Phantom III model by using specific winter oils.
| Identifier | ExFiles\Box 139\3\ scan0137 | |
| Date | 24th November 1937 | |
| By/NW.{N. Walker - Patents} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. By.{R.W. Bailey - Chief Engineer} 1164 Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}1/AP.24.11.37. COLD STARTING P.III. Owing to the difficulty of starting a P.III. in cold weather due to sticking of the valve gear, we recommend a leaflet is sent to all owners of cars prior to D.{John DeLooze - Company Secretary} series much as follows:- 'If the car will ever have to be started from cold in a place of lower temperature than about 40°F.{Mr Friese} (5°C) trouble can be avoided by using a viscosity 20* oil and this is strongly recommended for winter weather.' * Wakefield's C.W., Vacuum Arctic, Single Shell or Duckham's N.P.XX. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} | ||