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).
Continued report page comparing oil types and recommending British suppliers.
| Identifier | ExFiles\Box 144\1\ scan0107 | |
| Date | 1st January 1925 guessed | |
| contd :- -2- 'C' 'BB' Fatty oil content - 4.7% 0.80% Total acidity - 0.3% 0.17% Mineral acids - Negligible. Negligible. We have not experienced piston squawks on experimental 20 HP. cars, neither was it reported in the 10,000 miles test on production cars. If we use a mineral oil we should recommend we buy from a British Firm; both Vacuum and Valvoline are U.S.A. Firms. We also recommend that if we have a fault which is due to the oil, we should take the matter up with Prices before condemning their product. Hs.{Lord Ernest Hives - Chair} | ||