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).
Recommendations and experience with Vacuum A and Vacuum BB oils.
| Identifier | ExFiles\Box 144\1\ scan0169 | |
| Date | 29th April 1929 | |
| To BP. from Hs.{Lord Ernest Hives - Chair} x967? Hs{Lord Ernest Hives - Chair}1/LG29.4.29. x1588 With reference to the attached. We have carried out no tests on Vacuum A.{Mr Adams} oil. Springfield recommend Vacuum BB. as an alternative oil and frequently when running cars on the Continent and no other oil has been available we have used Vacuum BB. We have had no experience with Vacuum 'A' so cannot make any recommendations. Hs.{Lord Ernest Hives - Chair} | ||