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).
Log of oil consumption and related maintenance over several months, including calculations for miles per gallon.
| Identifier | ExFiles\Box 142\3\ scan0056 | |
| Date | 1st July 1932 | |
| G.W.69/32 - 1 Jul Car away in France during this Month. OCTOBER. 8497. oil changed. 8895. 2½ pints added. Miles = 398 to 2½ pints of oil = 1272 m.p.g. NOVEMBER. 9252. 1 qrt. Note taken of consumption, but not tested. 9656. 2 qrts. over a period of 4 days, 274 miles were 9880. 1 qrt. covered on 1 qrt of oil making a consumption 10146. 1 qrt. of 1096 m.p.g. 10788. 1 qrt. Car had new "L" type piston rings fitted at 11071. 1 qrt. W. also it was decarbonised. Consumption over 11345. 1 qrt. 663 miles to 3 qrts = 884 m.p.g after being described. Miles for month 2450 to 2 galls of oil = 1225 m.p.g. O.V.S. | ||