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).
Series of graphs comparing the performance of 'Luber-Finer', 'General', 'AC', and 'Smith' oil reconditioners over time.
| Identifier | ExFiles\Box 135\3\ scan0255 | |
| Date | 11th March 1938 | |
| OIL RECONDITIONER TESTS "LUBER-FINER", "GENERAL", "A.C." AND "SMITH" % INCREASE PURITY/TIME TESTS: USED OIL - 75°C, PRESSURE - 30 LB/SQ. IN. % INCREASE PURITY MEASURED BY A.C. OIL SEDIMENT METER TESTING TIME - HRS. Graph 1: AC AND LUBER-FINER "LUBER-FINER" INITIAL PURITY 47% "AC" 1ST TEST INITIAL PURITY 48% "AC" 2ND TEST INITIAL PURITY 23% Graph 2: GENERAL "GENERAL" 2ND TEST INITIAL PURITY 27% "GENERAL" 1ST TEST INITIAL PURITY 55% Graph 3: "SMITH" "SMITH" 2ND TEST INITIAL PURITY 49% "SMITH" 1ST TEST INITIAL PURITY 44% | ||