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).
Graph of distillation curves comparing Shell Mex with paraffin, U.S.A. Socony Winter Quality, and U.S.A. Commercial Low Test fuels.
| Identifier | ExFiles\Box 50\3\ Scan187 | |
| Date | 1st September 1921 | |
| DEGREES FAHRENHEIT PER CENT DISTILLATION CURVES. ① SHELL MEX WITH 20% PARAFIN ADDED ② U.S.A. SOCONY WINTER QUALITY (OY4/G.15821) ③ U.S.A. COMMERCIAL LOW TEST (OY4/G.15821) | ||