1994 Chevrolet Corvette Owner's Manual - Page 181

Service and Appearance Care NOTICE: If you use oils that don't have the GM4718M Standard designation, you can cause engine damage not covered by your warranty. I Recommended SAE Viscosity Grade Engine Oils For best fuel economy and coldstarting, .select the lowest viscosity grade oil SAE for the expected temperature range. 0 SAE 5W-30 As shown in the viscosity chart, SAE 5W-30 is bestfor your vehicle. However, you can use SAE 1OW-30 if it's going to be 0°F (-18°C) or above. These numbers on an oil container show its viscosity, orthickness. Do not use other viscosity oils such as SAE 20W-50. HOT WEATHER WOK FOR ONE OFTHESE LABELS @ Oils meeting these requirements should also have either one or bothof these symbols on the container. You should look for theseon the oil container, and use &o those oils that are identified as meetingGM Standard 4718M and have either the "starburst" symbol or the API doughnut symbol with either the SH or the SG designation. Your Corvette engineis filled at the factory with a Mobil l @ synthetic oil, which meets all requirements for your vehicle. 1 r SAEZ-30 PREFERRED / r COLD WEATHER .. I 8 0