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).
Laboratory readings table of used and unused Mobiloil A, AF, BB, D, and Gear Box oil.
| Identifier | ExFiles\Box 145\1\ scan0132 | |
| Date | 2nd June 1933 | |
| TABLE 111 Laboratory readings of used and unused oils tested May 29 - June 2, 1933. | | MOBILOIL A | MOBILOIL AF | MOBILOIL BB | MOBILOIL D.{John DeLooze - Company Secretary} | |---|---|---| | | Used | Unused | Used | Unused | Used | Unused | Used | Unused | | Sp.{Mr Spinney}Grav. @ 60°F.{Mr Friese} | 0.898 | 0.900 | 0.904 | 0.905 | 0.902 | 0.903 | 0.894 | 0.896 | | Cold Test °F.{Mr Friese} | 10° | 15° | 15° | 15° | 20° | 20° | 5° | 5° | | Open Flash °F.{Mr Friese} | 390° | 425° | 385° | 440° | 390° | 455° | 430° | 455° | | Redwood Vis. 70°F.{Mr Friese} | 1401" | 1503" | 1866" | 2090" | 2595" | 2850" | 3450" | 3560" | | Redwood Vis. 140°F.{Mr Friese} | 162" | 173" | 190" | 210" | 248" | 271" | 325" | 351" | | Redwood Vis. 200°F.{Mr Friese} | 61.6" | 63" | 67.4" | 70" | 80" | 83" | 99" | 105" | | Colour (Lovibond) | 170 | 120 | 203 | 170 | 185 | 130 | 187 | 170 | | Acidity as SO3 | 0.004% | 0.002% | 0.004% | 0.002% | 0.004% | 0.002% | 2.5% | 2.7% FFA. | | Fuel Dilution | 1.0% | | 1.2% | | 1.2% | | 1% | | GEAR BOX OIL Sp.{Mr Spinney}Grav. at 60°F ... 0.910 Cold Test °F.{Mr Friese} ... 5° Open Flash °F.{Mr Friese} ... 405° Redwood Vis. 70°F.{Mr Friese} ... 1466" " " 200°F.{Mr Friese} ... 56.4" Colour (Lovibond) .... 76 | ||