Tht RURAL. NEW.YORKER 
975 
i 
-'Tractor Performance 
Is Governed by Lubrication 
The service and power your tractor delivers—its performance—depends 
largely on correct lubrication—a gas-tight piston-to-cylinder seal— 
every bearing and moving part oil-cushioned against wear and running 
quietly. This requires an oil that will maintain its lubricating and pro¬ 
tective qualities under most severe conditions of engine heat and load 
—because tractor engines generally operate at full load and develop 
an unusually high engine heat. 
So-CO-NY 
Tractor Engine Oil 
is the oil leading tractor manufacturers recommend. It maintains cor¬ 
rect body and lubricating qualities at the high operating heats com¬ 
mon to tractor engines. Keeps engine wear and tear at lowest figures 
—the tractor in first class condition the year round at the smallest cost 
for overhauling and repairs. 
Piston Rings and Lubrication. When an oil film of correct body 
and lubricating qualities constantly separates the piston rings from the 
cylinder walls, it holds compression tight, gets all the usable power 
out of the fuel, protects the cylinder walls from being scratched and 
the piston rings from wearing out quickly. All good reasons for keep¬ 
ing the crank case supplied with So-CO-ny Gas Engine Tractor Oil. 
For transmission gears and other parts requiring a heavier oil, use 
Polarine Gear Oil. Keeps gears operating quietly with least possi¬ 
ble wear. 
Fill the cups with Polarine Transmission Gup Grease—acid-free 
and all lubricant. 
For tractor service and economical operation buy your oils, greases 
and fuels under the So-CO-ny Sign. 
TRACTOR 
ENGINE 
^ OIL ^ 
STANDARD OIL CO. OF NEW YORK 
Principal Offices 
Boston 
Buffalo 
Albany 
SOCONY TRACTOR 
SOCONY 
TRACTOR 
OIL FOR 
PISTON 
RINGS 
