1995 Pontiac Trans Sport Owner's Manual - Page 284

RECOMMENDEDSAEVISCOSITYGRADE ENGINE OILS 3800 V6 Engine As shown in the chart, SAE 1OW-30 is best for your vehicle. However, you can use SAE 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 use SAE 5W-30. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50. FORREST FUEL ECONOMY AND COLDSTARTING,SELECTTHE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. HOT WEATHER I_\ "F t 100- "C i +38 +27 +EO- - +60- - +16 +40--+4 i +20---7 0---le 111 SAE 1OW-30 PREFERRED above 0°F SAE 5W-30 I I (-18°C) 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. COLD WEATHER DO 'NOTUSE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED 3800 V6: Oil Viscosity Chart 6-15