1998 Pontiac Grand Prix Owner's Manual - Page 292
1998 Pontiac Grand Prix Manual
Page 292 highlights
I I RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VlSCOSlTT GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. HOT WEATHER \ As shown in the chart, you have the 3100 engine, if SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going be 0°F (-18°C) or to above. These numbers on an container show its oil viscosity, or thickness.Do not use other viscosity oils, such as SAE 20W-50. SYMBOL --- I SAE 3 -0 w 3 PREFERRED COLD WEATHER DO NOT USE SAE 2OW-50OR ANY OTHER GRADE OIL NOT RECOMMENDED 3100 Engine 6-17
As
shown
in
the
chart,
if
you
have
the
3100
engine,
SAE
5W-30
is
best
for
your
vehicle.
However,
you
can
use
SAE
1OW-30
if
it’s
going
to
be
0°F
(-18°C) or
above.
These
numbers
on
an
oil
container
show
its
viscosity,
or
thickness.
Do
not
use
other
viscosity
oils,
such
as
SAE
20W-50.
I
RECOMMENDED SAE
VISCOSITY
GRADE ENGINE
OILS
FOR
BEST FUEL ECONOMY AND COLD STARTING, SELECT THE
LOWEST
I
SAE
VlSCOSlTT GRADE
OIL
FOR
THE
EXPECTED
TEMPERATURE
RANGE.
HOT
WEATHER
SYMBOL
\
-
I
SAE
3w-30
PREFERRED
COLD
WEATHER
DO
NOT
USE
SAE
2OW-50
OR
ANY
OTHER
GRADE
OIL
NOT
RECOMMENDED
3100
Engine
6-17