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).
Table tracking oil consumption and component mileage for various chassis, with notes on engine modifications.
| Identifier | ExFiles\Box 159\5\ scan0192 | |
| Date | 30th April 1941 guessed | |
| THESE ENGINES HAVE .031 OIL JET HOLES IN CONN.RODS CHASSIS | Oil Consumption M.P.G. | Cyl. Block Mileage | Conn. Rod Mileage | Piston Mileage. | Notes --- | --- | --- | --- | --- | --- 8.B.V. | 1106.4 | 2031 | EW.1764 Wraith Drilled. 2031 | 19755 | Pistons in cyl. Nos. 1 and 3 changed. 9.B.V. | 606.4, 728, 656.8 | 16364 | 4708 | 4708 | 12.B.V. | 2313 | 34914 | 36539 | 34914 | CHECK HOLES 2.B.50 | 2211.2 | 26594 | 26594 | 26594 | CHECK HOLES. 4.B.50 | 1792 | 19541 | 19541 | 19541 | RELY ON TRANSPORT FOR FIGURES 3.B.50 | 1700, 1148, 2689.6 | 20308 | 20308 | 20308 | NOTE: OIL JET HOLES BLANKED OFF. For the last oil cons. check we were dependent on the transport figures for oil used. 30.G.VII | 1161.6 | 71474 | 19040 | 71474 | NOTE: WRAITH RODS EW.1749/50 NOT DRILLED 1.B.50 | 1209.12 | 7286 | 7286 | 7286 | NOTE: Conn rods are Experimental production only Ex.36632/3. SHORT INSERTS. .010 OVERSIZE. | ||