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 Sterns Ltd. detailing the physical test results of their lubricating oils for winter and summer.
| Identifier | ExFiles\Box 32\4\ Scan246 | |
| Date | 17th June 1926 | |
| CONTRACTORS TO H.M. GOVERNMENT. STERNS LTD. Chairman: THE RIGHT HONOURABLE LORD ATHLUMNEY, C.B.E. REFINERS OF PETROLEUM PRODUCTS. ROYAL LONDON HOUSE, FINSBURY SQUARE, LONDON, E.C. 2. Telephone: CLERKENWELL 1875. (4 lines). Telewriter: WALBROOK 584. All communications must be addressed to the Firm and not to individuals. Telegraphic Address: CENTUMVIR, TELEW. LONDON. Cables: CENTUMVIR, LONDON. Codes: A.B.C. 4th, 5th & 6th EDNS. WESTERN, BENTLEYS, MARCONI, SCOTT'S. Motor MT GHR/3/27 17th June 1926 Messrs. Rolls-Royce Ltd., 14/15, Conduit Street, W.1. Dear Sirs, FOR ATTENTION OF MANAGING DIRECTOR. We tender our thanks for your letter of the 11th inst., Ref.BJ1/E11/6/26 in connection with the lubrication of Rolls Royce Engines and are pleased to note that we may submit for the consideration of your engineers particulars of the physical tests of Sternol WW. The grades which we have found most suitable and which are used by our Managing Director and our other Directors who are running Rolls-Royce Cars, are Sternol WW Medium for winter lubrication and Sternol WW Heavy for summer lubrication. These oils have tests as follows:- FOR WINTER LUBRICATION. STERNOL WW MEDIUM. Specific gravity .......... .910 Open Flashpoint .......... 415°F Redwood Viscosity @ 140°F . 210" " " @ 200°F . 69" FOR SUMMER LUBRICATION. STERNOL WW HEAVY Specific Gravity .......... .907 Open Flashpoint .......... 415°F Redwood Viscosity @ 140°F . 285" " " @ 200°F . 84" These oils are all British products, manufactured at our London works under our special voltolising process. We put them forward with absolute confidence in their ability to afford the most efficient lubrication procurable and sincerely hope that after your engineers have perused the above specifications [Handwritten note top]: attached JS{Mr Johnson's Secretary} [Stamp]: POST RECEIVED 18 JUN 1926 | ||