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).
Typed letter discussing upcoming and past tests to determine oil differences in cars or engines.
| Identifier | ExFiles\Box 145\2\ scan0014 | |
| Date | 13th January 1933 guessed | |
| -2- You will of course realise that to make a definite technical report on the difference in oil can only be given after considerable experience and a number of tests on various cars or engines. The test which we hope will be more conclusive is the one we expect to run in France, starting in about two week's time. There we have a very definite comparison, because we have already run a car 12,000 miles under similar conditions with standard XL. With very kind regards, Yours sincerely, | ||