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 the Vacuum Oil Company regarding engine oil temperatures, sludge formation, and filtration.
| Identifier | ExFiles\Box 145\1\ scan0059 | |
| Date | 1st December 1933 | |
| X1886. WE DO NOT HOLD OURSELVES RESPONSIBLE FOR LOSSES OR DAMAGE RESULTING FROM DELAY IN FILLING ORDERS CAUSED BY STORM, STRIKES, FIRE, DIFFERENCES WITH WORKMEN OR ANY CAUSE BEYOND OUR CONTROL. Vacuum Oil Company, Limited MANUFACTURERS AND MARKETERS OF HIGH GRADE LUBRICATING OILS AND GREASES SOLE MARKETERS OF Mobiloil - THE WORLD'S QUALITY MOTOR OIL AUTOMOTIVE LUBRICANTS DEPARTMENT. TELEGRAPHIC ADDRESS VACUUM, PHONE, LONDON. TELEPHONE WHITEHALL 1010 (14 LINES) WHEN TELEPHONING PLEASE ASK FOR EXTENSION N° GARGOYLE REGD TRADE MARK. MANUFACTURING PLANTS. WANDSWORTH, LONDON. WEST FLOAT, BIRKENHEAD. BRANCH OFFICES BELFAST SCOTTISH PROVIDENT BUILDINGS. TELEGRAMS VACUUM BIRMINGHAM 6, CAROLINE STREET. TELEGRAMS VACUUMPAN BRISTOL 58, QUEEN'S ROAD, CLIFTON. TELEGRAMS GARGOYLE PHONE CARDIFF DOMINIONS HOUSE, QUEEN STREET. TELEGRAMS VACUUM DUBLIN 32, NASSAU STREET. TELEGRAMS VACUUM GLASGOW 400 E.{Mr Elliott - Chief Engineer} CATHEDRAL STREET. TELEGRAMS VACUUMPAN HULL 27, SCALE LANE. TELEGRAMS VACUUM LIVERPOOL CUNARD BUILDING. TELEGRAMS VACUUM MANCHESTER 196, DEANSGATE. TELEGRAMS VACUUM NEWCASTLE-ON-TYNE COMMERCIAL UNION BUILDINGS, PILGRIM STREET. TELEGRAMS VACUUM SHEFFIELD QUEEN'S BUILDINGS. QUEEN STREET. TELEGRAMS VACUUM IN REPLY PLEASE REFER TO B1/Eng CAXTON HOUSE, WESTMINSTER, LONDON, S.W.1. 1st December 1933. Messrs. Rolls-Royce Ltd., Derby. For the attention of Mr.Hives. Dear Sirs, We find that when writing to you on the 30th ultimo., we omitted to mention a point to which we had intended to draw your attention. This was in connection with the matter of high oil temperatures. You will fully appreciate that the higher the temperature to which the oil in an engine is exposed, the greater is the liability to oxidation of the oil and, therefore, to the amount of sludge present in the used oil after a given amount of work. This is one of the principal reasons why we prefer to see oil temperatures kept in the region of 80°C to 90°C, because in cases where such temperatures are not exceeded it is almost always found that the amount of sludge in crankpins, oilways, etc., is greatly reduced, thereby lessening the risk of mechanical trouble caused by partially choked lubrication system. In cases where high temperatures cannot be avoided it seems advisable to give careful consideration to the possibility of passing the oil through a filter to some point in the system, but such a filter would have to be of a type capable of dealing with very small particles and it would also seem desirable that it was fitted in the main supply and not on a by-pass circuit. Yours faithfully, VACUUM OIL COMPANY, LIMITED O.{Mr Oldham} T. Jones Chief Engineer Automotive Department AD/LEB UNLESS STATED OTHERWISE, ALL OILS ARE QUOTED AND INVOICED PER UNIT GALLON OF 9-LBS. ALL QUOTATIONS ARE WITHOUT ENGAGEMENT UNLESS STATED OTHERWISE. | ||