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).
Testing super-Shell lubricating oil, detailing its efficiency and effect on engine noise.
Identifier | ExFiles\Box 32\4\ Scan216 | |
Date | 24th October 1925 | |
W/S. To H.{Arthur M. Hanbury - Head Complaints} from Hs{Lord Ernest Hives - Chair}‡ X1588 Hs{Lord Ernest Hives - Chair}2/LG24.10.25. H2/TB/20.10.25. We have tested super-Shell Lubricating oil. It is a very thin oil and for that reason is better for efficiency. We would not like to recommend it as standard because it does accentuate engine noises. A considerable amount of noise is damped down by oil viscosity. We have no reason to doubt however, that the car will function perfectly satisfactory with this oil. Hs.{Lord Ernest Hives - Chair} | ||