62
SUPPLEMENTAL
ENGINE
OIL
ADDITIVES-The
regular
use
of
supplemental additives
is
specifically
not
recommended
and
will increase operating
costs. However, supplemental additives are
available
that
can
effectively
and
economically
solve
certain specific
problems
without
causing
other
difficulties.
For example, if higher
detergency
is
required
to
reduce varnish
and
sludge deposits resulting
from
some
unusual
operational
difficulty,
a
thoroughly
tested
and
approved additive -
"Super
Engine
Oil
Supplement"
-
is
available
at
your
Oldsmobile dealer.
In
the
event
of an
operational
problem, consu
It
your
dealer for advice before using
supplemental additives.
TRANSMISSION
FLUID
RECOMMENDATIONS
Use
automatic
transmission
fluids
identified with
the
mark
DEXRO~-II
or
DEXRON®,
available
from
your
Oldsmobile dealer
or
local service station.
Check
the
fluid level
at
each engine oil
change period.
To
make
an
accurate fluid
level
check:
1. Drive car
several miles, making
frequent
starts and stops,
to
bring transmission
up
to
normal
operating
temperature
(approximately
180-190°
F.).
2. Park car
on
a level surface.
3.
Place selector lever
in
"Park"
and leave
engine running.
4.
Remove dipstick
and
wipe clean.
5. Re-insert dipstick until cap seats.
6. Remove dipstick
and
note
reading.
If fluid level
is
at
or
below
the
"ADD"
mark,
add
sufficient fluid
to
raise
the
level
to
the
"FULL"
mark.
One
pint
raises
the
level from
"ADD"
to
"FULL".
Do
not
overfill.
Under normal driving conditions,
the
transmission fluid
and
strainer should be
changed every
24,000
miles. If
your
car
is
driven extensively
in
heavy
city
traffic
during
hot
weather,
or
is
used
to
pull a
trailer, change fluid every
12,000
miles and
install new strainer. Likewise,
operators
of
cars
in
commercial use (such as
taxicab,
limousine
or
patrol car service) where
the
engine idles
for
long periods, should change
fluid every
12,000
miles.
ENGINE
COOLING
SYSTEM
The
recovery
type
cooling system
is
standard on all Oldsmobiles
and
is
designed
to
maintain
the
engine
at
proper
operating
temperatures.
The
recovery
tank
collects
coolant
that
expands
with
rISing
temperature
that
would otherwise overflow
from
the
system. When
the
system
temperature
drops,
the
coolant
is
drawn
from
the
recovery
tank
back
into
the
radiator
by
the
suction created
by
coolant
contraction.
The
cooling system has been
filled
at
the
factory
with
a high-quality,
inhibited, year-around
coolant
that
meets
the
standards
of
General
Motors
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