1994 Pontiac Trans Sport Owner's Manual - Page 215

Service & Appearance Care 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; HOT WEATHER What Kind of Oil to Use (CONT) 0 NOTICE: If you use oils that not have do either the "starburst" symbol or an API SH designation, you can cause engine damage not covered by your warranty. GM Goodwrench@ oil Canada, GM (in Engine Oil) meets all the requirements for your vehicle. SGor SH LOOK FOR ONE OF THESE &souN# LABELS LYI)IYCC "SG" or "SH" must be on the oil container, either by itself or combined with other quality designations, such a 6 "SH/CD," "SH,SG,CD," or "SG/CD" etc. These letters show American Petroleum Institute (API) levels of quality. 0 SAE 1OW-30 (3800 V6 Engine) SAE 5W-30 (3.1L V6 Engine) 0 Engine Oil Additives SAE 5W-30 Don't add anything to your oil. Your Pontiac dealer is readyto advise if you Oils with these words on the container think something should be added. will help you save fuel. Energy Conserving I1 SAE 1OW-30 PREFERRED (-18"') 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 SAE IOW-40, SAE 2OW-50 OR ANOTHER GRADE OIL NOT RECOMMENDED. These three things are usually included in a doughnut shaped logo (symbol) on most containers. If you cannot find oils with the "starburst" symbol, you should look for oils with the doughnut shaped symbol, containing the three things noted above.