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atmospheric-
temperatures
-expected
during the period the oil is to
remain in the engine.
Ba~ed
on these considerations, the numbers of
engine oil which are recommended for the Pontiac engine under various
climatic conditions are as follows:
Atmospheric rem".nrfur.s:
ExpectM
32·F. to 11 O"F.
____ .....
IO"F. lIO"F.
IO"F. below zero to 9S" above zero
IO·F. below zero and colder .
...
.
S.A.E. Numbe,
Acceptable
Mulfigrode
IOW-30
1----110W_20
1----11 SW-20
NOTE: Petroleum based oils which are identified as
"For
Service MS
or
DG"
are recommended
for
the Pontiac Engine.
OIL CHANGE RECOMMENDATIONS-Engine oil should be
changed whenever it becomes contaminated. Contamination is usually
due to the accumulation of water, dust or dirt, or the breakdown
products of the oil and fuel.
It is always advisable to drain the crankcase only after the engine
is thoroughly warmed. The benefit of draining is lost, to a large extent,
if the crankcase is drained when the engine is cold as the oil will be
thick and will not drain thoroughly.
The crankcase refill capacity is 5 quarts except when the oil filter
element is changed. The refill capacity with a filter element change
is 6 quarts.
FIRST 1,000 MILES- The oil placed in the crankcase at the factory
is
a
high quality
"MS')
type, lOW oil with special break in additives
and should be left in the engine for the first 1,000 miles. At the end
of the first 1,000 miles, the crankcase should be drained and refilled
to the proper level with an oil suitable for your individual climatic
and driving conditions as recommended in the above chart. Should
it be necessary to add or change engine oil during the first 1,000
miles, an oil not heavier than lOW should be
used.
Average Driving-For average driving conditions, an oil change is
recommended every 3,000 to 4,000
miles.
This applies to all owners
with the exception of those driving under the conditions described
in the following paragraphs.
Driving in Dust-When the car is generally operated in dusty
territory, consideration should be given to more frequent oil changes.
[38]
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