1996 Oldsmobile Silhouette Owner's Manual - Page 258
1996 Oldsmobile Silhouette Manual
Page 258 highlights
RECOMMENDEDSAEVISCOSITYGRADEENGINE OILS FOR BESTFUELECONOMYANDCOLDSTARTING,SELECTTHELOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE RANGE. As shown in the chart,SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going to be 0"F (- 18 C ) or above. These numbers an oil on container show its viscosity, or thickness. Do use not SAE other viscosity oils, such as 2OW-50. O HOT WEATHER NOTICE: Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the recommended oil can result in engine damage not covered by your warranty. GM Goodwrench@ oil meets all the requirements for your vehicle. E low-30 SAE 5w-30 PREFERRED Engine Oil Additives Don't add anyhng to your oil. Your Oldsmobile retailer is ready to adviseif you think something should added. be DONOT USE SAE 2OW-50 OR ANYOTHER GRADE OIL NOTRECOMMENDED - COLD WEATHER 6-12