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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 experimental work on Mobilgrease and a comparison of Mobiloil Aero H and Aero W.

Identifier  ExFiles\Box 145\1\  scan0016
Date  4th May 1933
  
RR 81588.

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

TELEGRAPHIC ADDRESS
VACUUM, PHONE, LONDON.

TELEPHONE
WHITEHALL 1010 (10 LINES)

WHEN TELEPHONING PLEASE ASK FOR EXTENSION No.

GARGOYLE
REGD TRADE MARK.

AUTOMOTIVE LUBRICANTS DEPARTMENT.

CAXTON HOUSE, WESTMINSTER,
LONDON, S.W.I.

IN REPLY PLEASE REFER TO
Auto Dept.
Eng. Div.

4th May, 1933.

Messrs. Rolls-Royce Limited.
Derby.

Dear Sirs,

For the attention of Mr.E.W.Hives. HS{Lord Ernest Hives - Chair}

Further to the interview granted Mr.J.Russell Sharp and the writer in January last we have been doing some experimental work on Mobilgrease No.6. when immersed in a boiling mixture of 75% water and 25% ethelyne glycol. This mixture does not appear to affect Mobilgrease No.6. in any way and we believe it will prove entirely satisfactory as a lubricant for water pump spindles either when used with water or the mixture referred to.

Further to the discussion on the use of a heavier oil than D.T.D.109 in engines running at high oil temperatures we have pleasure in giving the following comparison

Mobiloil Aero H.{Arthur M. Hanbury - Head Complaints} Mobiloil Aero W.
Specific Gravity .897 .893
Air Ministry Pore Test OK OK
" " Flow " OK OK
Open Flash 530° 475°
Closed Flash 495° 450°
Fire 585 540
Poises @ 100°F 3.42 2.29
" @ 200°F 0.254 0.200
Coke No.before oxidation. 1.02 0.59
Coke No.after oxidation 2.46 1.8
Increase in viscosity after oxidation. 1.6 1.5

MANUFACTURING PLANTS.
WANDSWORTH, LONDON.
WEST FLOAT, BIRKENHEAD.

BRANCH OFFICES
BELFAST, BIRMINGHAM, BRISTOL, CARDIFF, DUBLIN, GLASGOW, HULL, LIVERPOOL, MANCHESTER, NEWCASTLE-ON-TYNE, SHEFFIELD.

VACUUM OIL COMPANY ORGANIZATIONS ABROAD.
ADELAIDE, ALEXANDRIA, AMSTERDAM, ATHENS, AUCKLAND, ANGKOK, BARCELONA, BASLE, BATAVIA, BELGRADE, BERLIN, BOMBAY, BOSTON, BRISBANE, BRUSSELS, BUCHAREST, BUDAPEST, BUENOS AIRES, CAIRO, CALCUTTA, CAPE TOWN, CHICAGO, CHRISTCHURCH, COLOMBO, COPENHAGEN, CZECHOWICE, DARWIN, DRESDEN, DURBAN, FRANKFORT, GENOA, GOTHENBURG, HAMBURG, HELSINGFORS, HONG KONG, ISTANBUL, JOHANNESBURG, KARACHI, LAS PALMAS, LIMA, LISBON, LORENZO MARQUES, MADRAS, MADRID, MANILA, MARSEILLES, MELBOURNE, MEXICO, MILAN, MOMBASA, MONTEVIDEO, NAPLES, NEW YORK, OSLO, PARIS, PERTH, PHILADELPHIA, PRAGUE, RANGOON, RIGA, RIO DE JANEIRO, ROME, ROTTERDAM, SEVILLE, SHANGHAI, SINGAPORE, SOERABAYA, STOCKHOLM, SYDNEY, TANGIERS, TOKIO, VALPARAISO, VIENNA, WARSAW, WELLINGTON, YOKOHAMA, ZAGREB.

Offices and Depots in every country in the World (Russia excepted)

Mobiloil AND THE WORLD-WIDE ORGANIZATION OF THE VACUUM OIL COMPANY ARE ALWAYS AT YOUR SERVICE
  
  


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