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).
From Vacuum Oil Company Limited regarding changes to Mobiloil grades and distribution.
| Identifier | ExFiles\Box 145\2\ scan0059 | |
| Date | 1st February 1935 | |
| No. 5. but announcements to the public will not be made until adequate quantities are generally available at Garages and Filling Stations. Selling prices remain as formerly. Grades in Distribution. The grade names and letterings will be unchanged as regards Mobiloil A, BB and D.{John DeLooze - Company Secretary} Mobiloil AF will be discontinued as it becomes redundant in view of the improved viscosity curves of Mobiloil A and BB. These two oils cover a wider viscosity range than was previously possible with the three oils, thus covering 98% of the requirements of all motor cars in the U.K. In Great Britain, the North of Ireland and Irish Free State Mobiloil Arctic (Clearosol Process) will be available, if required, for use during winter in tightly built engines. It will be universally available in foreign countries where winter conditions are more severe than in Great Britain. VACUUM OIL COMPANY LIMITED. O.{Mr Oldham} T. Jones Chief Engineer. OTJ/AR. February, 1935. | ||