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).
To inspecting engineers about the interchangeability of recommended chassis lubricants for customers.
| Identifier | ExFiles\Box 145\3\ scan0191 | |
| Date | 4th July 1938 | |
| TO ALL INSPECTING ENGINEERS. EF. FDR, Hd.{Mr Hayward/Mr Huddy} Br, JLE{J. Lee Evans - Chassis Test Manager} (for demonstrators.) H.14/H 4.7.38. CHASSIS LUBRICANTS. Will you kindly note in respect of the oils mentioned in the Instruction Books respectively for P.III, 25/30 HP and Bentley cars that to avoid partiality in our verbal recommendations you can inform any customer or his driver that any one of the oils recommended for some component of his car can be mixed indiscriminately with one of the other recommended brands. Customers frequently ask us for example what oil was supplied in their engine. Whether you know what oil it was or not you can reply that the customer may top up or re-fill with any one of the brands recommended in his book. This information will be of use to all customers on the road as they may not always find the particular oil they happen to be using. H.{Arthur M. Hanbury - Head Complaints} | ||