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).
Internal query regarding the most suitable engine oil for a customer's vehicle in the United States.
| Identifier | ExFiles\Box 88\1\ scan0223 | |
| Date | 20th April 1936 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hd{Mr Hayward/Mr Huddy}/SB{Mr Bull/Mr Bannister}8/HR.20.4.36. Rm{William Robotham - Chief Engineer} Mr. R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} Wilkinson, the Owner of B.107-BL., requires information as to what is the most suitable engine oil to be used in the United States. Apparently, he has been using Quaker State, S.A.E.30, and he wonders if either No. 20 or No. 40 would be a more suitable lubricant. If you have any information which we can pass on to Mr. Wilkinson, we shall be obliged. Hd{Mr Hayward/Mr Huddy}/SB{Mr Bull/Mr Bannister}8 | ||