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changed, and improvements in engines, such as the crank-
case ventilating system have greatly lengthened the life of
good lubricating oils. However, to insure continuation
of
best performance, low maintenance
COSt and
long
engine
life,
it
is necessary to change the crankcase oil whenever
it
becomes contaminated with harmful foreign materials.
Under normal driving conditions draining the
crankcase
and refilling Wilh fresh oil
every
2000 lO
3000
miles is
recommended.
Frequent long runs
at
high
speed,
with resultaOl high
engine
operating temperatures, may
oxidize
the oi.l
and
rna}'
result
in the formation of sludge and varnish. While no definite
drain periods can be recommended. under these conditions,
they should
be
more frequent than under normal driving
conditions.
Driving over dusty roads or through dust Storms introduces
abrasive material into the
engine.
The frequency
of
drain-
ing depends on severity of dust
conditions and
no definilf'
draining periods can be recommended bUl should
be
more
frequent than under normal driving conditions.
Short runs in cold weather, such
as city
driving
and exces-
sive idling, do nOl JX.rmit thorough warming up
of
the
engine and waLer may accumulate in the
crankcase
from
condensation of moisture produced by the
burnin~
of
the
fuel. Water in the crankcase ma), freeze
and
intrrfere with
58
proper oil circulation. [(
also
promotes
rustin~
and may
cause
clogging of
oU
screens and
passages.
Under
nannal
driving
conditions
this water
is
removed
in
the
form
of
vapor by
the
crankcase
ventilator. However,
if water
accumulates,
it
should
be removed
by
draining
the crank-
case
as
frequently
as
may be required.
it
is
always advis-
able to drain
lhe crankcase only after lhe engine
has
become
thoroughly warmed up
or
reached
normal
opcrat~
ing temperature. The benefit
of
drainin~
is,
10
a
large
extent,
lost if the
crankcase
is
drai_
ned
when
the
engine
is
cold,
as some
of
the suspended foreign material will
cling
to the
sides
of the oil pan
and
will
not drain
OUl
readily
with the cold,
slower
moving
oil.
Flushing the
crankcase
wilh oil, Or
Solulion,
olher lhan
a good grade of SAE
lOW
engine
oil
is
not recommended.
Maintaining Oil Level
The oil
gauge
roo i, marked
"Fuji" and"
Add Oil." These
notations have broad
arrows
pointing
to
the level lines. The
oillevcl should be
maintai.ned
between the
two Lines,
neither
going
above the
"FuJI"
li.ne nor
under
the
"Add OiP'
line.
Check
lhe
oil
level
frequently and add oil
when necessary.
Always
bt:
sure
the
crankcase is
fuJI
before starting
OUt
on
a
long drive.
C rankcase DUution
Probably the most serious phase
of engine:
oil deterioration
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