1998 Pontiac Firebird Owner's Manual - Page 269

RECOMMENDED SAE VISCOSITY GRADE EH61NE OILS HWI BEST FUEL ECONOMY AND COLD STARTIWB, SELECT THE LOWEST S4€ YISCBSITT 8RllM OIL FOR THE EXPECTED TEMPERANURE RANGE. HOT WEATHER As shown in the chart, if you have the3800 engine, SAE low-30 is best for your vehicle. However, you can useSAE 5W-30 if it's going to be colder than 60°F (16°C) before your next oil change. When it's very cold, you should useS A E 5W-30. These numbers on an oil container show its viscosity, thickness. Do or not use other viscosity oils, such S A E 20W-50. as 1 1 1 SAE low-30 PREFERRED m b o v s OF O (-16'C) I I NOTICE: Use only engine oil with the American Petroleum Institute Certiaed For Gasoline Engines ''Starburst" symbol. Failureto use the recommended oil can result engine damage not in covered by your warranty. GM Goodwrench@oil meets all the requirements for your vehicle. If you are in an area where the temperature below falls -20°F (-29"C), consider using either an SAE SW-30 synthetic oilor an SAE OW-30 oil. Both will provide easier cold starting and better protection your engine for at extremely low temperatures. COLD WEATHER DO NOT USE SAE 2OW-50 OR AMY OTHER GRADE OIL NOT RECOMMENDED 3800 V6 Engine 6-16