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).
Suitability and availability of Essolube and Mobiloil for Bentley cars in the United States.
| Identifier | ExFiles\Box 145\1\ scan0172 | |
| Date | 29th July 1936 | |
| W/S - Vr.{E. S. Voller - Orders} X1229 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}12/KW.29.7.36. Replying to Vr{E. S. Voller - Orders}/RJC.16/WL28.7.36, I am afraid we have had no experience with Essolube, but Mobiloil BB should be obtainable in the States as it is produced by the Vacuum Oil Company. This is the ordinary Summer oil for the Bentley. The Winter oil I used out there was Mobiloil 'Arctic'. If these particular grades have been discontinued, any Vacuum Service Station should be able to tell the owner the corresponding oils in the Vacuum range. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||