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).
Cold room test log detailing engine starting performance with various oils.
| Identifier | ExFiles\Box 145\1\ scan0131 | |
| Date | 2nd June 1933 | |
| TABLE 11. COLD ROOM TEST LOG. | Date | Grade of oil circulated throughout engine. | Temp. of Cold Room (°C) | Hours car had been in Cold Room. | Temp. of Sump Oil (°C) | Test Condition A.{Mr Adams} or B. | Batty. O.C. volts. | Mean Batty. volts on load. | Mean starter volts on load. | Mean Starter Current (Amps) | Mean Speed. | Approx. Torque at motor shaft (lbs.ft.) | |---|---|---|---|---|---|---|---|---|---|---|---| | 30.5.33. | Mobiloil A.{Mr Adams} | -0.5 | 15 | -0.2 | Clutch out Battery at 0°C A S.G. = 1315 | 13.28 | 8.9 | 7.3 | 358 | 974 | 6.1 | | | | | | | Immediate repeat with B clutch in & gear in neutral. | 12.63 | 8.9 | 7.4 | 330 | 1074 | 5.77 | | 31.5.33. | Mobiloil AF. | -0.5 | 16 | -0.2 | Condition A | 12.78 | 8.8 | 7.1 | 377 | 779 | 6.73 | | | | | | | Condition B | 12.61 | 8.7 | 7.1 | 361 | 830 | 6.56 | | 1.6.33. | Mobiloil BB | -0.5 | 16 | -0.2 | Condition A | 12.8 | 8.5 | 6.9 | 410 | 466 | 7.77 | | | | | | | Condition B | 12.48 | 8.3 | 6.5 | 390 | 581 | 7.36 | | 2.6.33. | Mobiloil D | -0.5 | 17 | -0.2 | Condition A | 12.81 | 8.3 | 6.4 | 406 | 486 | 7.7 | | | | | | | Condition B | 12.6 | 8.175 | 6.375 | 384 | 490 | 7.68 | | ||