TYPES
OF
OIL
In service. crankcase oils
may
form sludge a,nd 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
li
ght and favorable service conditions.
"Service MM" (Comparab
le
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
cha
racteristics
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.
id
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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