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).
Testing of Price's oil in relation to its effect on hydraulic tappets.
| Identifier | ExFiles\Box 91\2\ scan0058 | |
| Date | 2nd July 1937 | |
| W/S. C. from Rm.{William Robotham - Chief Engineer} 300a Rml3/R.2.7.37. PRICE'S OIL - C8/C26.6.37. 32-EX at present running 15,000 miles has the hydraulic tappets deleted. It is also fitted with the over-drive gearbox. In order to get a value for the over-drive gearbox relative to its effect on bearings, it was necessary that we should run on Wakefield's oil. As the only objection to Price's oil, however, was its effect on the filter for the hydraulic tappets, if the test is successfully completed, it will permit us to remove the ban on this lubricant. Rm.{William Robotham - Chief Engineer} | ||