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).
Table of physical characteristics for different grades of Veedol Motor Oil.
| Identifier | ExFiles\Box 32\4\ Scan173 | |
| Date | 20th August 1924 guessed | |
| PHYSICAL CHARACTERISTICS VEEDOL MOTOR OIL. BRAND FORZOL ZERO LIGHT MEDIUM FORZOL HEAVY SPECIAL HEAVY EXTRA HEAVY Gravity 23 24.5 26.5 26.6 26.1 26.1 26.0 Flash 335 375 405 410 415 430 480 Fire 385 450 470 480 485 505 555 Chill 0º 5 30 30 30 35 35 Vis.@ 100° F.{Mr Friese} 203 193 288 300 375 525 1430 Vis.@ 212° F.{Mr Friese} 46 46 51 54 57 65 116 % Carbon Residue .12 .15 .31 .31 .36 .54 1.22 o/o Fatty Oil None None None 5 o/o None None None | ||