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).
Comparison of Redwood I Viscosity for Univis and Castrol 'F' oils at various temperatures.
| Identifier | ExFiles\Box 152\1\ scan0251 | |
| Date | 8th February 1937 guessed | |
| UNIVIS versus CASTROL "F". Grade. Univis. Castrol "F". Univis. (7525) (8416) Redwood I Viscosity @ 20°F.{Mr Friese} 8,000 secs. 8,000 secs. 3,000 secs. 32. 5,000 " 4,200 " 2,100 " 70. 1,400 " 800 " 575 " 100. 645 " 300 " 275 " 120. 405 " 183 " 181 " 140. 271 " 115 " 127 " Handwritten text: Compressor oil Mobiloil arctic | ||