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TYPES OF OIL
In
service.
crankcase
oils may form sludge
a,
n d varnish
and
under
some
condilio05
corrosive
acids unless protected
against
oxidation.
To minimize the formation of these harm-
ful products and to
supply
the type
of
oil best
suited
for var-
ious operating
conditions,
the oil industry markets several
types of crankcase
oils.
These types have been defined
by
the
American Petroleum Institute as
follows:
"Service
ML"
(Comparable
to former Regular Type)-
Generally
suitable
for use in internal combustion
(::ngines
operating under
light
and
favorable
service conditions.
"Service MM"
(Comparable
to
former
Premium Type)-
Oil having the
characteristics necessary
lO
make
it
generally
suitable for use in internal combustion
engines
operating
under moderate
to
severe service conditions which present
problems of sludge,
varnish or
bearing
corrosion
control
when crankcase
oil
temperatures are high.
"Service MSt!
and "Service
DG"
(Comparable
to former
Heavy-Duty Types)-Oils having the
characteristics
10
make them generally suitable for use
in
internal
combustion
engines oPerating under unfavorable or severe types
of
service
conditions.
For maximum eogine prOlcction under all driving
conditions
I
oils designated "For Service MS" or
"For
Service DG" arc
recommended.
II
these
arc
DOL
availablc, oils designatcd
uFor Service MM" may
be.
used. NOl
recommcnded:
oils
designated "For Service
ML."
26
MAINTENANCE SCHEDULE
EVERY 1000 MILES
ChlllsiI
Lubricalion:
See pages
24
and
25
for location
chassis lubrication
poiots.
Slar/er
So/moid:
A rew
drops
of engine
oil should
be
used
on the pivots of the starler
shift
lever
mecbanism.
Do
not oil solenoid plunger.
Cmera/or:
Fill cups at
both end.
of tbe
geoerator
with SA!
20 oil. Also
see
page
60.
Rear Ax/e:
At
operating
temperature, lubricant
sbould
be
level
with
filler plug hole in
each
unit. Add hypoid
lubricant such as SAE
90 "Multi-Purpose".
Do not
usc:
straight mineral oil
gear
lubricants.
NOTE: "Multi-Purpose" gear
lubricants
must be
tb.
latest non-corrdsive type
of
proved quality.
The
lubricant
manufacturer
must
be
respon-
sible
for the satisfactory
performance of
his
prooucL
His
reputation
is your
best
indication
of
quality.
Powerglidt Transmis.non
:
Check
oil level with
engine
idling,
parking
brake set,
transmission warm and
control
lever
in
CoN"
position. Add
only I(Automauc Transmission
Flu.
i d Type A",
bearing
an AQ-ATF
number
when
level reaches" Add 1 qt." mark
on oil
level
rod.
Do
not allow dirt to enter filler
tube.
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