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).
Test report on Packard oil following a dynamometer run.
| Identifier | ExFiles\Box 127\1\ scan0019 | |
| Date | 21th June 1912 guessed | |
| [Handwritten]: X.435 Packard. Tested on dynamometer. Distance run - 10 miles. Power at 1500 r.p.m. - Very good. Power at 2000 r.p.m. - Very good. Exhaust - Very clean. Engine - Very "free". Lack of carbon deposit - Very good. This oil shows very well from test but has not [handwritten insertion: enough] body and is not sufficiently viscous to be satisfactory in the long run. The consumption would probably be great as it appears to be very volatile. [Handwritten vertically on left margin]: X15-34 | ||