2005 Chevrolet Corvette Owner's Manual - Page 365

Recommended Fluids and Lubricants Fluids and lubricants identified below by name, part number or specification may be obtained from your dealer. Usage Fluid/Lubricant The engine requires a special engine oil meeting GM Standard GM4718M. Oils meeting this standard may be identified as synthetic, and should also be identified with the American Petroleum Institute Certified for Gasoline Engines starburst symbol. However, not all synthetic API oils with the starburst symbol will meet this GM standard. You should look for and use only an oil that meets GM Standard GM4718M. GM Goodwrench® oil meets all the requirements for your vehicle. For the proper viscosity, see Engine Oil on page 5-14. Usage Fluid/Lubricant 50/50 mixture of clean, drinkable Engine Coolant water and use only DEX-COOL® Coolant. See Engine Coolant on page 5-22. Hydraulic Brake Delco Supreme 11 Brake Fluid or System equivalent DOT-3 brake fluid. Windshield GM Optikleen® Washer Solvent. Washer Solvent Hydraulic Clutch System Hydraulic Clutch Fluid. Use only GM Part No. U.S. 88958860, in Canada 88901244, Super DOT-4 brake fluid. Engine Oil Power Steering GM Power Steering Fluid (GM Part No. U.S. 89021184, in System Canada 89021186). Chassis Lubrication (Rear Toe-Link Outer Ends with Z51 Option) Chassis Lubricant (GM Part No. U.S. 12377985, in Canada 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB. 6-11