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).
Test log documenting cold starting performance with Mobiloil Arctic and Castrol X.L. at various temperatures.
| Identifier | ExFiles\Box 151\3\ scan0343 | |
| Date | 14th December 1937 guessed | |
| 22.G.V. COLD STARTING TESTS. MOBILOIL (ARCTIC). Room Temp. | Oil in Sump. | Remarks. | --- | --- | --- | --- | | Starts every 20-30 mins. 0°F | 32°F | 2 secs. started ran evenly immediately. | R.P.M. 120 -4°F | 23°F | 2 secs. started ran evenly immediately. | R.P.M. 100 -8°F | 14°F | 3 secs. started ran evenly immediately. | R.P.M. 100 -11°F | 8°F | 3 secs. fired and ran ½ min. started ran evenly at 10 secs. | R.P.M. 100 CASTROL X.L. 20°F | 34°F | 3 secs. started ran evenly after 7 secs. | R.P.M. 100 10°F | 23°F | 3 secs. started ran evenly after 7 secs. | R.P.M. 70 5°F | 14°F | 10 secs. threw out 3" fired for 2 secs. 5" started and ran evenly after 17 secs. | R.P.M. 40 | ||