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).
Specification comparison sheet for Mobiloil D and Mobiloil AF.
| Identifier | ExFiles\Box 145\1\ scan0119 | |
| Date | 22th December 1932 guessed | |
| W56-12948 No. V.O.Co., Ltd., to Mobiloil D.{John DeLooze - Company Secretary} Mobiloil AF. Specific Gravity (max.) .895 .900 Pour Point °F (max.) 5 5 Open Flash °F (min.) 455 430 Redwood Viscosity (approx.) @ 70°F 3400" 2240" @ 140°F 335 220" @ 200°F 102 73" | ||