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 use Castrol XL oil as a suitable alternative for 40/50 HP and 20 HP cars.
| Identifier | ExFiles\Box 32\3\ Scan068 | |
| Date | 3rd June 1924 | |
| BP. from Hs.{Lord Ernest Hives - Chair} X1583 Hs{Lord Ernest Hives - Chair}5/LG3.6.24. Chassis No. 50-TG-S. Parker. With reference to Bsll/KW2.6.24 and letter attached from S. Parker of Bolton, dated 30th. May. We have run considerable mileage on Castrol XL. and have found it to be a suitable alternative to Prices oil both for 40/50 HP. and 20 HP. cars. We should recommend that we tell this customer that it is quite in order to use Castrol XL. if he wishes. Hs.{Lord Ernest Hives - Chair} | ||