San Antonio light. [volume] (San Antonio, Tex.) 1911-1993, 1925-08-23
OIL FL I { R s
LENGTHEN|NG
CAR LIFE
Better Performance Shown
as Lubricant Cleaned,
Engineer Says.
By B. II. ANIBAL

Chief Engineer, Oakland Motor Company
Friction is defined as the resist
ance to motion due to the contact of
surfaces 1t is one of the many i'm
portant problems automotive engineers
have to combat, and it takes heavy
toll in power that otherwise would be
productive, and in wear and tear.
fabrication is our chief weapon
against friction, and proper lubrica-
ton reduces FRACTIONAL loss and wear
and tear to a minimum. When lubri-
cation functions 100 per cent, moving
metal surfaces do not touch. They
are separated by film Of pure oil
and the only friction is the rubbing
of one layer of this oil film against
another layer.
Absolute perfection, however, is diff
ficult to attain, and even when we
approximate it in the fabrication sys-
tens of the better automobiles, there
is another factor remaining. This is
the contamination of the lubricant by
the entrance of foreign particles.
EATS DIRT.
An automobile engine resembles O
human in that il tries "to eat a peck
of dirt during its lifetime. Minute
particles of dirt and grit are constant
~ finding their way into the vitals
of the engine through the air the car
buretor breathes or via the gasoline
line. Practically all of this dirt finds
its way into the lubricant. either d.
rectly or after it is formed into car
bon in the cylinders, and then breaks
off and mixes with the oil. Naturally
these particles Of grit break the pro
tective oil film and set up friction
that wears cylinder walls, pistons, pis-
ton pins, connecting rods and crank
shaft bearings.
To overcome this condition the new
Oakland Six is equipped with an oil
filter. This device has no moving
parts and is entirely automatic. 1t
consists of metal mesh and fabric
through which the entire supply of
engine lubricant passes several times
an hour. The filterins material re-
moves all dirt and foreign substances
from the oil. returning it to the crank
case purified.
BETTER PERFORMANCE.
Test cars driven thousands of miles
showed better performance and less
wear when the filter was in use The
amount of dirt collected from the oil
surprised even engineers who knew a
considerable quantity would be found
In addition 10 this newest method
of lettering lubrication, the Oakland
has an enlarged oil pan with an oil
screen built its full length. There Is
space under the screen for the accum-
ulation Of water, which gets into the
oil through condensation Of moisture
in the air, SO that in the event of this
water freezing in cold weather the
ice formed is below the level of the
oil pump. The oil pressure regulator
u located in the center of the crank
case where il insurcs full uniform
pressure and is accessible for adjust.
ment.
SOLVES PROBLEMS.
The oil duct in the crankshaft is
continuous passage the length of the
shaft, constructed without any oil
tubes. Oil is fed through each Of the
three main bearings into this passage,
equalizing the pressure and flow of
oil to all bearings, both maiS and
connecting rod. Leads from the oil dis
tributing system also 90 direct TO all
the camshaft bearings and the timing
chain and sprocket. The use Of press
ure feed to the connecting rod bear
ings through holes drilled in the crank
shaft provides positive fabrication.
This careful attention to correct
fabrication is helping solve the prob
lens brought up by that greatest
enemy of automobile characterization