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).
Petrol consumption, oil consumption, and mileage.
| Identifier | ExFiles\Box 101\4\ scan0164 | |
| Date | 11th January 1936 | |
| x500a 10th/11th Jan. 1936. 21-G-IV. Petrol consumption 15.2 m.p.g. Mileage 457. Oil consumption 914 m.p.g. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} | ||