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 the oil consumption of an E.A.C V Series engine using different piston types.
| Identifier | ExFiles\Box 72\1\ scan0009 | |
| Date | 31th March 1925 | |
| OIL CONSUMPTION E.A.C V SERIES CALCULATED ON POWER AT FULL LOAD. OLD TYPE PISTONS. LATEST PISTONS OLD TYPE PISTONS WITH 'L' SECTN RINGS. PTS/HP/HOUR. .03 .02 .01 R.P.M. 2000 2500 2750 | ||