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).
Chassis cold starting test results using Arctic Mobiloil and Castrol CW.20.
| Identifier | ExFiles\Box 151\3\ scan0340 | |
| Date | 10th December 1937 guessed | |
| 5.B.IV CHASSIS. COLD STARTING TESTS. ARCTIC MOBILOIL Room Temp. | Oil in Sump. | Remarks | Starts every 20 - 30 mins. 10°F | 40°F | One second on starter | R.P.M. 150-200 5° | 28°F | One second on starter | R.P.M. 150 -3° | 14°F | 5 secs. threw out 3 " started } | R.P.M. 100 -8° | 8°F | 10 secs. threw out ) 2 " " ) 2 " Started ) In all cases engine picked up on all six evenly after 2 - 3 secs. | R.P.M. 100 CASTROL. CW.20. 0°F | 28°F | 2 secs. started | R.P.M. 100 -3°F | 23°F | 2 secs. threw out } 2 " started } | R.P.M. 100 -6°F | 14°F | 7 secs. threw out ) 2 " " " ) 2 " Started ) | R.P.M. 70-75 -8°F | 8°F | 7 secs. threw out ) 2 " " " ) 3 " Started & ran unevenly 1/2 min. & stopped ) 2 " threw out ) 3 " " " ) 3 " started and picked up evenly on all six after 5-6 secs. ) | R.P.M. 70-75 | ||