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).
Recommendation to address U.S.A. customer complaints of cylinder wear by using a lubricant composed of 80-90% castor oil.
| Identifier | ExFiles\Box 32\3\ Scan057 | |
| Date | 8th June 1921 | |
| X/583 Extract from R1C/G8.6.21. X.3614 - RE U.S.A. COMPLAINTS. X.1583. X.544. RE WEAR. With regard to the question of wear, my memo of October last year (RB{R. Bowen}/G5.10.20) on lubricating oils, recommended that American owners should be encouraged to use a mixed lubricant largely composed of castor oil, which I then stated was specially suitable for their requirements, as they complained of cylinder wear largely due, I believe, to the petrol in cold weather washing the oil off the cylinder walls. The oil should contain roughly 80% to 90% castor oil, the rest being mineral, as stated in the memo in question. Mr. Hives recently confirms that inefficient lubricating oils is the cause of wear, i.e. bad quality of oil, and also good oil which has become dirty or diluted with kerosine from the gasoline. Remedy - use better oil as advised, and clean out sump more often. MADE AT CROXLEY | ||