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).
Summary of two consumption tests showing petrol and oil usage.
| Identifier | ExFiles\Box 169\3\ img031 | |
| Date | 9th May 1933 | |
| CONSUMPTION TESTS. ----------- 9.5.33. 5.Per.II. 160 Miles. 10 galls. 2 pts (Petrol) 1 pt. (oil). 3 hrs. 50 mins. Petrol cons. 15.6 mpg. Oil cons. 1280 mpg. 3.Per.II. 160 miles. 8 galls 7 pts (Petrol) 1½ pts (oil). 3 hrs. 50 mins. Petrol cons. 18 mpg. Oil cons. 853 mpg. ----------- | ||