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).
Log of petrol tank level measurements and gauge readings against mileage and time.
| Identifier | ExFiles\Box 44\3\ Scan127 | |
| Date | 17th November 1928 | |
| Tank filled to brim of filler, holding just under 15 gallons. Two gallons taken out, leaving petrol level just under 13 gallons. Level say 12.75 Miles. Time. Gauge reading (approx) 17/11/28. 0 3.40 0 10 4.5 11.75 20 4.25 11.9 20 Stood outdoors 2 hours. 11.9 20 6.25 11.9 25 6.55 11.9 25 Stood over-night 11.75 18/11/28. 25 10.25 11.75 30 10.36 12.00 40 10.55 12.00 50 - 12.00 | ||