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).
Request for analysis of four oil samples from a 15,000-mile test of a Castrolite Oil Unit.
| Identifier | ExFiles\Box 97\4\ scan0147 | |
| Date | 21th November 1938 | |
| To HL/EJW. Hoob Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}5/JH.21.11.38. Castrolite Oil Unit B.III No.5. 15,000 miles test. Herewith four samples marked A.B.C.D. We are anxious to know the percentage and nature of the foreign matter contained in each sample. We should also like microphotos of any metallic, siliceous or similar particles found if this is possible. A 7036 miles. B 12,383 miles. New Filter cartridge fitted. C 1023 miles after fitting new cartridge. D 4868 " " " " | ||