1995 Pontiac Firebird Owner's Manual - Page 250

3.8L L36 (Code K) RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. As shown in the chart,SAE 1OW-30 is best for your vehicle. However,you can useSAE 5W-30 if it's going to be colder than60 O (16 O C) before your next F oil change. When it's very cold, you should SAE use 5W-30. These numbers on an container show its oil viscosity, or thickness. not use other viscosityoils, Do such as SAE 20W-50. L HOT WEATHER I 7 "C t 38 NOTICE: Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the proper oil can result in engine damage not covered by your warranty. GM Goodwrench@oil (in Canada,GM Engine Oil) meets all the requirements for your vehicle. + 27 + 16 t4 -7 -18 I , I SAE 1DW-30 PREFERRED I SAE 5W-30 above 0°F (-18T) I COLD WEATHER IF NEITHER SAE 5W-30 NOR SAE 1OW-30 GRADE OILS ARE AVAILABLE, SAE 30 GRADE MAY BE USED AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C) DO NOT USE SAE2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 6-17