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 the viscosity of various oils at low temperatures.
| Identifier | ExFiles\Box 27\1\ Scan170 | |
| 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 ) (Mobiloil A.{Mr Adams} " ) Too thin for universal (Mobiloil BB. " ) use at warmer temps. At 19°F {Castor P3. 36 ) {Castor P2. 40 ) Not recommendable - {Mineral P4. 42 ) (distribution etc.) (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. | ||