Log of oil sample mileage for two vehicles, 26.G.VI - 25/30 and O.B.IV - BENTLEY, noting oil filter performance.
| Identifier | ExFiles\Box 145\3\ scan0168 | |
| Date | 7th April 1938 | |
| 600u 1235/ OIL SAMPLES (HANDED TO Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} ) 7.4.38. 26.G.VI - 25/30. Total miles run since fitting filter - W.1. 3,694 miles. W.2. 5,826 miles (Filter leaking. New unit fitted). W.3. 8,529 miles. W.4. 10,722 miles. W.5. 17,930 miles. (Filter leaking. New unit fitted). O.B.IV - BENTLEY. Total miles run since fitting filter - B.1. 8,473 miles. B.2. 11,017 miles. Rm {William Robotham - Chief Engineer} /IMW. {Ivan M. Waller - Head of Chateauroux} | ||
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).