What kind of engine oil to use – GMC 2003 Sierra User Manual
Page 395
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What Kind of Engine Oil to Use
Oils recommended for your vehicle can be identified by
looking for Ihe starbuml symbol.
This symlMl indicates that the oil has bean certrfied by
the American Petrofeurri institute (API). Do not usa
any oi\ iAfhtch doss not carry (his starhurst symbol.
If you choose to periom
the engine oif change
service your&etf, tie sure
the oil you use has
the starburst symbol on
the front of Che oil
container, (f you have your
oil changed for you, ba
sure Ihe oil put into
your engine is American
Petroleum Inslilute certified
For gasoline engines.
You should also use the proper viscosity oil for your
vehicle, a& shown in ths' viscosity chart.
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LOOK
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SYMBOL
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COLD
WEATHER
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OR
ANV ËTHEfî
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5-30