General
Lubrication
The
subject
of
lubrication
of
the
complete
automobile
should
be
given
careful
attention.
It
is
important
that
the'
luhncation
scYredule
be
followed
and
that
the
proper
pubricant
be
used
if
'the
car
is
t~
give
quiet
and
&~ient
performance.
The
use
of
high
grad'e
lubricants
wlll
prolpng
the
life
of
the
wearing
parts
and
prove
most
iconomical
in
the
long
run,
It
is
now;
common
practice
6f
oil
companies
to
designate
their
oil
by
the
S.
A.
E.
classification,
instead
of
the
old
method
qf
dsiggnatinn
as
light,
medium
or
heavy.
The
application
of
the
S.
A.
E.
viscosity
number
to
a
lubricant
is
intended.only
b
indbate
the
body
or
fluidic
of
the
oil
and
has
no
bearing
on
the
quality
of
the
prod&,
OaJy
high
quality
oils
furnished
by
reputable
companies
should
be
used
and
for
accuracy
they
should
he
ordered
by
S.
A.
E.
numbers.
1
I
Zt
is
essential
to
add
oil,
as
requirec&
to
maintain
the
correct
oil
Ievel.
Choose
the
proper
viscosity
from
the
following
bble
in
accordance
with
the
lowest
temperature
expected
to
be
encountered.
Engine
Oil
Viscosity
Below
minus
10°F..
.......................
-10-W
plus
ID%
kerosene
Minus
10QF.
.............................
-10-W
Plus
10°F.
...................
,.
.......
.20-W
32°F.
.............................
.S.
A.
E,
30
.
90°F.
extreme
summer
temperature
...
.S.
A:
E.
4d3
I
The
best
p&rformance
of
the
engine
will
be
ohtainedi
by
using
the
h
correct
body
(S.
A.
E,
number)
of
engine
oil
in
the
engine
crankcase
asi
specified
in
the
abwe
table.
The
oil
shouId
be
of
a
low
S.
A&.
number
in
cold
weather
to
provide
proper
starting
and
a
higher
number
in
warm
weather
to
provide
economical
consumption.
When
Should
Oil
Be
Changed
Obviously
the
time
between
crankcase
drains
depends
efitirely
upon
the
driving
conditions.
In
considering
the
foIIowing
factors
as
ta
when
to
change
the
oil
it
should
be
kept,
in
mind
that
good
lubrication
is
low
priced
insurance
against
high
maintenance
costs.
The
first
change
should
be
made
preferably
at
the
end of
the
hsi-500
miles,
thereafter,
2,000
mile
changes
are
recommended
as
that
mpst
dosely
approximating
average
conditians,
but
the
+anges
shouId
be
controlled
by
the
driving
conditions
as
pointed
out'below.
The
engine
oil
should
be
changed'in
accordaice
with
temperature
variations
rather
than
according
to
seasons.
In
some
lachlites
variations
in
temperature
are
so
&&reme
that
several
grades
may
be
required-
du'rhg
1
I.
the
course
of
a
year.
i
Low
maintenance
costs,
Iong
engine
life
and
best
perfbrinance
yilI-be
insured
by
changing
the
crankdase
oil
when
it-
becames
contamma:ed.
Driving
over
dusty
roads
or
through
dust
storms
with
dirt-cloggd
a~
cleaners,
introduces
abrasive
material
in
the
crankcase.
If
this
is
nqt
removed
immediately
by
draining
the
crankcase,
harmful
engine
wear
may
result.
17
