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).
Test results table for Bentley cars comparing Standard pistons and Aerolite pistons over various mileages.
| Identifier | ExFiles\Box 87\2\ scan0144 | |
| Date | 10th October 1935 | |
| AEROLITE PISTONS. 10,000 MILES TESTS - BENTLEY. Standard Pistons. | Date | Car | Total mileage | Oil Consumption. | |-----------|----------------------|---------------|----------------------------------------------| | 16.2.33. | 1-B-IV. | 12,713 | Start 879 Finish 755 Pistons Broken | | 31.7.33. | 1-B-IV. | 7,000 | Start 894 Finish 730 Pistons broken | | 4.10.33. | 1-B-IV. | 6,054 | Start 504 Finish 1100 Pistons Broken | | 22.11.33. | 1-B-IV. | 15,595 | Start 1296 Finish 696 | | 29.1.34. | 4-B-IV. | 10,000 | Start 1067 Finish 760 | | 23.5.34. | 4-B-IV. | 2,500 | Start 700 Finish 880 EB.1295. Dural con. rod broken. | Aerolite Pistons. | 26.6.34. | 4-B-IV. | 2,000 | Start 1412 Finish 1380 | | 13.7.34. | 4-B-IV. | 14,648 | Start 1000 Finish 1595 | | 6.4.35. | 5-B-IV. | 10,630 | Start 1052.7 Finish 1556 | | 10.10.35. | B-56-BN.{W.O. Bentley / Mr Barrington} Large Bore | 14,045 | Start 581 Finish 1860 | | ||