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One of the Army World 
Cruisers being used on 
the globe-encircling 
flight . 
U, S. fliers in daring 
attempt to circumnavi- 
gate the World- 
Adventure l 
T HE four U. S. Army fliers have “hopped 
off ” on their round-the-world flight. 
Danger rides as the unsought passenger. 
Even the most modern safeguards do not 
remove the thrill and the peril of The Great 
Adventure. 
Much depends upon the engines. Are they 
mechanically perfect? Will they “carry 
through” safely? This is assured. Every 
precaution has been taken. 
The men behind the flight know the im¬ 
portance of correct lubrication in assuring the 
smooth, powerful operation of these engines 
of the sky. 
They are using Gargoyle Mobiloil “B.” 
The flight outside of the U. S. has been 
divided into six divisions and an advance 
officer detailed to each division to make all 
preparations. At Seattle, pontoons will re¬ 
place the landing gears and the ships will 
proceed northward as seaplanes to Prince 
Rupert, to Alaska around the curve of the 
Aleutian Islands, to Japan, China and India. 
From Calcutta through Persia, the Near East 
and Europe to England, the planes will carry 
landing gears. Before leaving England pon¬ 
toons will again take the place of the landing 
gears for the homeward flight across the 
Atlantic. 
Airplane and tractor engines must con¬ 
stantly work at full capacity. This is a heavy- 
duty, heat-developing work, and the use of un¬ 
suitable oil commonly results in premature 
breakdowns and wasteful fuel and oil con¬ 
sumption 
The same Gargoyle Mobiloil “ B is recom¬ 
mended for the Avery, the Holt, the Oil Pull 
and many other makes of tractors, while 
Mobiloil “BB” which is exactly the same oil 
except a little lighter in body is recommended 
for the Fordson, the Cletrac, the Wallace and 
others. 
The use of Mobiloil as specified in the Chart 
of Recommendations will show you a decided 
lowering in operating expense in both your 
tractor and automobile. 
And in using Mobiloil you assure the same 
reliability of service which is of the utmost 
importance in the Round-the-World flight. 
Domestic 
Branches: 
New York {Main Office) 
Indianapolis 
Milwaukee 
Boston 
Minneapolis 
Albany 
Chicago 
St. Louis 
Buffalo 
Philadelphia 
Des Moines 
Rochester • 
Detroit 
Dallas 
Oklahoma City 
Pittsburgh 
Kansas City, Mo. 
Peoria 
New Haven 
Portland, Me. 
Springfield, Mass. 
Make the chart your guide 
VACUUM OIL COMPANY. 
