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).
Letter from W.B. Dick & Co Ltd regarding an ideal engine lubricant with 25% lard oil.
| Identifier | ExFiles\Box 76\4\ scan0179 | |
| Date | 23th September 1919 | |
| H.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. COPY. W.B. Dick & Co Ltd. 90 Fenchurch Street, London. E.C.3. 23.9.19. Ref. CED/H.{Arthur M. Hanbury - Head Complaints} Messrs. Rolls-Royce Ltd. Nightingale Rd., Derby. Dear Sirs, For the attention of Mr. Hives. Enclosed we submit for your attention an analysis of what we, after most extensive trials, consider the ideal article for lubricating an engine such as you manufacture. This contains 25%. of lard oil and a very highly refined low cold test mineral oil. We do not recommend more than 25% saponifiable matter, for in experiments we have carried out we find that if we have an excess of fat oil above this that it is apt to break up under heat, leaving mineral acids in the cylinders, which are detrimental to the pistons and rings as well as being an inefficient lubricant. The particular oil which we are submitting we have run for thousands of miles and find that it is not only a perfect lubricant but that the absence of carbon is almost extraordinary; any that does form can be wiped off with a rag. We seldom have the opportunity of persuading people to use this oil as they will not pay the price, which, taking into consideration the small quantity your cars use, and the excellent results you would obtain, is false economy. Contd. | ||