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).
Viscosity-temperature chart plotting various oils with comparative values at -7°C.
| Identifier | ExFiles\Box 145\1\ scan0075 | |
| Date | 1st November 1933 | |
| VISCOSITY-TEMPERATURE CHART A.S.T.M. TENTATIVE STANDARD D 341-32 T LUCAS' FIGURES (NOV. 1933) COMPARATIVE VALUES AT -7°C (20.6°F) ESSOLUBE RACING - 200 CASTROL XXL - 180 MOBILOIL CW - 158 " D - 118 CASTROL XL - 98 ESSOLUBE 50 - 98 " 40 - 82 MOBILOIL A - 78 " ARCTIC - 45 SHELL R.{Sir Henry Royce} - ? TEMPERATURE, DEGREES FAHRENHEIT VISCOSITY, REDWOOD SECONDS. Graph line labels: CASTROL XXL ST R MOTORINE(C) XL P COPYRIGHT, 1932 AMERICAN SOCIETY FOR TESTING MATERIALS 1315 SPRUCE ST.{Capt. P. R. Strong}, PHILADELPHIA, PA.{Mr Paterson} | ||