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 from Vacuum Oil Company suggesting suitable engine oil grades for instruction books based on weather conditions.
| Identifier | ExFiles\Box 145\1\ scan0113 | |
| Date | 3rd October 1934 | |
| BY APPOINTMENT VACUUM OIL COMPANY LIMITED GARGOYLE REGD TRADE MARK TELEPHONE WHITEHALL 1010 (14 LINES) TELEGRAMS VACUUM PHONE LONDON CAXTON HOUSE . WESTMINSTER LONDON . S.W.1 REFERENCE B1/Eng 3rd October 1934. Messrs. Rolls Royce Ltd., Derby. For the attention of Mr.E.W.Hives. Dear Sirs, We understand you will shortly be printing further editions of the instruction books for Rolls Royce and Bentley cars, and would like to suggest alterations to the section dealing with suitable engine oils. At present Mobiloil D only has been recommended, and we believe it is your experience that this grade is suitable for use both in summer and winter in the British Isles. We do feel, however, that many of your cars are taken abroad to countries where the winter is very much more severe than anything we experience here, and that it is therefore advisable to include suitable Mobiloil grades for such conditions. The form the note in the instruction books might take is as follows :- For normal use... ... ... ... ... Mobiloil "D" In very cold weather.. ... ... ... ... Mobiloil "AF" In extreme cold as experienced in certain foreign countries, e.g., 40° below freezing, etc... ... ... ... Mobiloil Arctic. Yours faithfully, VACUUM OIL COMPANY LIMITED (Signature) Chief Engineer AD/LEB UNLESS STATED OTHERWISE ALL OILS ARE QUOTED AND INVOICED PER UNIT GALLON OF 9 LBS. AND ALL QUOTATIONS ARE WITHOUT ENGAGEMENT. | ||