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).
Graph comparing the viscosity of Prices Motorine C and Lovejoy Oil against temperature.
| Identifier | ExFiles\Box 52\2\ Scan135 | |
| Date | 20th May 1928 | |
| VISCOSITY COMPARISON PRICES MOTORINE C AND LOVEJOY OIL. TEMPERATURE °C TIME OF EFFLUX. SECS. LIMITS of WORKING TEMPs for BRITISH ISLES LOVEJOY OIL PRICES MOTORINE C 20 MAY 1928 DERBY. | ||