1993 Pontiac Firebird Owner's Manual - Page 227

Service & Appearance Care Recommended SAE Viscosity Grade Engine Oils For best fuel economy and cold starting, select the lowestSAE viscosity gradeoil for the expected temperature range. HOT WEATHER What Kind of Oil to Use: Look for three things: 0 SG SG must be on theoil container, either by itself or combined withother quality designations, such as SG/CC, SG/CD, SF, SG, CC, etc. These letters show American Petroleum Institute (API) levels of quality. -- SAE W 3 -0 PREFERRED 1-1 ?%*&?+' SAE 1OW-30 6 LOOK FOR THIS LABEL S A E 5W-30 As shown in the viscosity chart, SAE 5W-30 is best for your vehicle. 1OW-30 if However, you can use SAE it's going to be 0°F (-18°C) or above. These numbers on an oil container Do show its viscosity, or thickness. not use other viscosity oils suchas S A E 1OW-40 or SAE 20W-50. Energy Conserving I1 Oils with these words the container on will help you save fuel. This doughnut-shaped logo (symbol)is used on most oil containersto help you select the correct oil. COLD WEATHER IF NEITHER SAE 5W-30 NORSAE1OW-30 GRADE OILS AREAVAILABLE,SAE 30 GRADE MAY BE USED AT TEMPERATURES ABOVE 40 DEGREES F (4 DEGREES C). DO NOT USE SAE 1OW-40, SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED. I 9 226