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).
Using an oil filter on the crankcase breather to prevent oil dilution.
| Identifier | ExFiles\Box 10\2\ 02-page16 | |
| Date | 31th October 1922 | |
| E.D.B/31.10.22. EXPERIMENTAL H.D.O. The use of the oil filter on the crankcase breather is to prevent the lubricating oil in the crankcase being diluted by petrol. Tests show that this is quite successful. | ||