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).
Letter discussing customer claims about improved engine performance using 'Shell-De-luxe' lubricating oil and requesting an examination.
| Identifier | ExFiles\Box 32\4\ Scan235 | |
| Date | 22th February 1926 | |
| Sydney Box 1120 H, Pt. 3/MM/22.2.26. [Stamp: POST 1 APR 1926 RECEIVED] [Handwritten: Sg{Arthur F. Sidgreaves - MD}] Sg.{Arthur F. Sidgreaves - MD} (London). Several customers here are now using an engine lubricating oil known as "Shell-De-luxe", marketed by the British Imperial Oil Company. In every case these customers claim that the running of engine has been improved, both as regards power output and speed, and I shall be very glad if you will be good enough to ask Derby to examine and report upon this lubricant, as I do not wish to either recommend or condemn same without something definite in the nature of a Work's report. [Handwritten: Pt.] [Stamp: RECEIVED ... APR 1926] | ||