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).
Comparison of different engine oils' consumption and viscosity, with notes on upcoming piston ring tests.
| Identifier | ExFiles\Box 144\3\ scan0062 | |
| Date | 23th June 1936 guessed | |
| -5- TYPE OF OIL, CONSUMPTION PTS/HR., REDWOOD VISCOSITY 110°C. 0°C. Castrol "Z", 1.75, 43.0, 7250 Castrol "C.W"., 2.75, 43.0, 9000 Castrol "XXL", 1.75, 79.0, 32500 Mobiloil "Arctic", 1.97, 44.0, 2600 Motorine "C", 1.50, 55.0, 26000 The most surprising fact from these figures is that Castrol C.W. is much worse than either Castrol "Z" or Mobiloil "Arctic" although the viscosity at 110°C. is approximately the same for all three oils. We have at present in connection with our tests on high oil consumption some scraper rings having various wall pressures from 22 lbs/sq.in. to 36 lbs/sq.in. but having ground finish and made to our standard ring dimensions, and also some Compression rings with 1° taper, and we hope to be testing these very soon. Hs{Lord Ernest Hives - Chair}/R.Matthews. | ||