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 table of the viscosity and performance of various oils at different low temperatures.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan190 | |
| Date | 19th April 1929 guessed | |
| -4- COMPARISON OF VISCOSITY OF VARIOUS OILS AT LOW TEMPERATURES. TEMPERATURES. REMARKS. At 13°F (Castrol R.{Sir Henry Royce} ) Still quite mobile. ) A good oil for this ) purpose. (Motorine C. 35 ) Too thin for universal (Mobiloil A.{Mr Adams} * ) use at warmer temps. (Mobiloil BB. * ) At 19°F (Castor P3. 36 ) Not recommendable - (Castom P2. 40 ) (distribution etc.) (Mineral P4. 42 ) (Bijur M.H. 125 ) Too thick for use in (Luvax Heavy 220 ) cold weather. (Mobiloil A.{Mr Adams} 20 ) See above. At 27°F (Adcol N.P. 22 ) Too thin for universal use (Motorine A.{Mr Adams} ) Congeals. (Castor P3. 20 ) See above. At 28.5°F (Mobiloil A.{Mr Adams} 17 ) * * (Adcol N.P. 18 ) * * At 32°F (Prices Amber A.{Mr Adams} ) Congeals. The figures denote the time in seconds taken for equal quantities to pour. ---------- Hs{Lord Ernest Hives - Chair}/F.Gaye. | ||