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).
Use and cost of lubricating oil, recommending Wakefields Castrol for its high castor oil content.
| Identifier | WestWitteringFiles\C\August1919\ Scan9 | |
| Date | 21th August 1919 | |
| To EH. from R.{Sir Henry Royce} Copy to C.J. W.D. [Struck through] N.A. [Struck through] ORIGINAL 4 R2/G21/8/19. RECEIVED 28 AUG 1919 X.47 X.1588 RE LUBRICATING OIL. In consequence of the small quantity of lubricating oil used by the R.R. car engine, the owners need not consider the cost of the oil very seriously. I shall be glad to know the present prices of various high class lubricants bought in the usual way by the Works, which would be about the same price as, a motor car trader and garage would buy for their resale. You will probably agree that Wakefields Castrol, (which appeared to contain only 10% of mineral oil, the rest being castor oil ) would promise to be the very best lubricant that can be put into a car engine. R.{Sir Henry Royce} | ||