1995 Chevrolet Corvette Owner's Manual - Page 250
1995 Chevrolet Corvette Manual
Page 250 highlights
RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST SAE VISCOSITY GRADE OIL FOR THE EXPECTED TEMPERATURE MNGE. SAE 5W-30 As shown in the viscosity chart, SAE 5W-30 is best for your vehicle. However, you can use SAE 1OW-30 if it's going to be0°F (-1S.OC) or above. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 20W-50. Oils meeting these requirements should also have the "Starburst" symbol on the container. HOT WEATHER LOOK FOR THIS SYMBOL -- 1-J SAE 1OW-30 DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED SAE 5W-30 PREFERRED COLD WEATHER The "Starburst" symbol indicates that the oil has been certified by the American Petroleum Institute (API),and is preferred for your gasoline engine. These oils may also beidentified as API SH. 6-15