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).
Letter to The Vacuum Oil Co. regarding the altering of oil viscosities which makes instruction books recommend unsuitable oil.
| Identifier | ExFiles\Box 145\1\ scan0247 | |
| Date | 21th February 1938 | |
| 1229 Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}2/MH.{M. Huckerby} 21st. February 1938. O.T.Jones, Esq., The Vacuum Oil Co., Caxton House, East, Westminster, LONDON, S.W.1. Dear Mr. Jones, Some of the oil companies have given us a lot of worry recently by altering the viscosities of their oils. This, of course, means that our instruction books for any except new cars recommend an unsuitable oil. Can we persuade the Vacuum Oil Co. to put the viscosity number after the names of all their oils so we can in future, say to our customers "Use viscosity 30 oil made by one of the following companies". We hope such an arrangement will meet with your approval. Yours sincerely, | ||