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).
Adding 10% paraffin to Shell Motor Spirit to match the distillation curve of American fuel.
| Identifier | ExFiles\Box 20\6\ Scan049 | |
| Date | 7th March 1921 | |
| X. 985 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to EF. HSB/LG/7.3.21. Re Petrol We find that it is necessary to add 10% paraffin to the Shell Motor Spirit in order to get a similar Distillation Curve to that which is obtained with the American fuel | ||