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).
Comparative report on oil and petrol consumption for car models 32-EX and 36-EX using various oil types.
| Identifier | ExFiles\Box 147\5\ scan0114 | |
| Date | 13th November 1936 | |
| FILE 1249. To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} 13.11.36. Comparative Oil and Petrol Consumptions using Castrol XL. and Mobiloil Artic Oils. 32-EX. Car Weight. c. q. lb. 51 0 21 Pistons. Standard production. Rings. 2nd. compression. L section. Conn.rods. Drilled oil holes. Petrol system - pumps in frame. --------- Castrol XL Miles run......189 Average speed. 50 M.P.H. Air Temp.. 10.5°C. Oil Consumption 336 M.P.G. Petrol " 8.8 M.P.G. --------- Mob.Artic Miles run.......189 Average speed 46 M.P.H. Air Temp. 6°C. Oil Consumption 432 M.P.G. Petrol " 10.2 M.P.G. Engine Unit No.13. Milage of engine 1,500 --------- Mob.Artic Spec S.A.E.Body No.10. 10.W Miles run....189 Average speed... 47 m.p.h. Air Temp... 9°C. Oil Consumption 465 m.p.g. Petrol 9.7 m.p.g. --------- 36-EX. : Car weights. c. q. lbs. 53 2 14 Pistons. Standard production. Rings. EB. slotted scraper. Conn.rods Plain rods. Petrol system. Pumps on dash. --------- Castrol XL Miles run......200 Average speed...45.2 M.P.H. Air Temp. 6°C. Oil Consumption 1,068 M.P.G. Petrol " 9.58 M.P.G. --------- Mob. Artic Miles run....... 189 Average speed 50 M.P.H. Air Temp. 10°C. Oil Consumption 1,008 M.P.G. Petrol " 9.2 M.P.G. Engine Unit No.11. Milage of engine 12,320 --------- Mob.Anti-Freeze. Miles run......189 Average speed 47 m.p.h. Air Temperature 9°C. Oil Consumption 672 m.p.g. Petrol " 9.7 m.p.g. --------- Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||