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 table of test results for various grades of Mobiloil (Clearosol Process).
| Identifier | ExFiles\Box 145\1\ scan0156 | |
| Date | 1st March 1935 | |
| MOBILOIL (Clearosol Process) GRADES National Physical Laboratory and other tests. ARCTIC "A" "BB" "D" Aero Mobiloil Red Band Aero Mobiloil Green Band DTD.109 (F.A.C) Before After Before After Before After Before After Before After Before After Before After Specific Gravity .869 .869 .879 .880 .883 .883 .883 .888 .882 .883 .888 .888 .899 .900 Pour Test °F -5 0 5 10 15 20 20 20 Fls.{F. Llewellyn Smith - Frames}@0 Fls.{F. Llewellyn Smith - Frames}@5 0 Fls.{F. Llewellyn Smith - Frames}@5 5 10 Open Flash Point °F 430 430 445 440 470 470 480 485 505 510 530 535 445 470 Closed Flash Point °F - 415 415 415 450 450 485(HW)465 475 475 500 500 440 440 Fire Point °F - 485 500 500 540 540 550 550 570 570 595 595 525 525 Redwood Viscosity @ 70°F 645 680 1347 1367 2220 2378 2650 2660 3245 3342 5240 5306 3293 3600 @ 100°F 264 265 480 492 784 794 930 948 1051 1070 1545 1560 1016 1077 @ 140°F 108 108 171 176 260 259 311 300 327 340 460 468 312 310 @ 200°F 52 54 65 65 83 83.5 99.4 98 100 102 124 126 91.5 94.5 Compound - - - - - - - - - - - - - - Colour - 65 - 63 - 90 - 90 - 63 - 90 80 90 Oxidation Test, Air Ministry Method R.{Sir Henry Royce} Coke 0.33 0.27 0.31 0.50 0.23 0.30 0.40 R.{Sir Henry Royce} Coke after oxidation 1.45 0.76 0.88 1.30 0.72 0.71 1.30 Viscosity Increase 2.02 1.47 1.31 1.71 1.34 1.13 1.67 National Physical Laboratory Test Seizing Temperature °C maximum 152 196 265 254 326 281 267 minimum 130 153 192 223 249 218 220 mean (approx.) 135 180 240 235 275 250 250 Minimum Coefficient of Friction maximum .0007₅ .0010₅ .0007₅ .0008 .0008₅ .0007₅ .0007₅ minimum .0007 .0008 .0006₅ .0006₅ .0006₅ .0006₅ .0006 mean .0007₃ .0009 .0006₇ .0007 .0007₅ .0006₇ .0006₅ March 1935 | ||