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 Price's Lubricants Limited with a table of viscosity data for Motorine M and Motorine E oils.
| Identifier | ExFiles\Box 144\1\ scan0282 | |
| Date | 14th February 1938 guessed | |
| PRICE'S LUBRICANTS LIMITED. -2- week he was furnished with a supply of Motorine M for this purpose. We are awaiting, as probably you may be, the outcome of this test with much interest, We are, Yours truly, PRICE'S LUBRICANTS LIMITED. J W Brooker TECHNICAL DIRECTOR. [Faint watermark text: ABSORBENT MADE IN GT BRITAIN] Temperature Viscosity, Redwood Secs. Grade oC oF. Motorine M.{Mr Moon / Mr Moore} Motorine E.{Mr Elliott - Chief Engineer} -10 32,300 11,500 - 5 16,000 6,500 0 9,400 3,900 5 5,700 2,400 10 3,575 1,625 15 2,300 1,125 20 70 1,550 815 1,490 755 30 830 445 40 450 260 60 140 160 110 60 52 100 200 55 48 1/2 150 36 34 1/2 | ||