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).
Graph comparing oil consumption versus R.P.M. for different piston types in an E.A.C.V series engine.
| Identifier | ExFiles\Box 180\M3\M3.1\ img003 | |
| Date | 31th March 1928 | |
| OIL CONSUMPTION E.A.C.V SERIES CALCULATED ON POWER AT FULL LOAD PTS/HP/HOUR. .03 .02 .01 2000 2500 2750 R.P.M. OLD TYPE PISTONS LATEST PISTONS OLD TYPE PISTONS WITH 'L' SECTN RINGS. 31-3-28 | ||