* L98 5.7L (350 cubic inch) small-block V8: This engine typically called for SAE 10W-30 oil. However, checking your owner's manual is crucial as the specific recommendation might vary based on climate and driving conditions. The manual will also specify the type of oil (conventional, synthetic blend, or fully synthetic).
* 305 cubic inch (5.0L) small-block V8: This engine also generally used SAE 10W-30, again with the caveat that your owner's manual is the definitive source for the correct grade and type.
Crucially: Always consult your owner's manual for the precise oil specifications recommended by Chevrolet for your specific 1987 Corvette. The information above is a general guideline, but the manual will provide the most accurate and safe recommendation. Ignoring the manual's recommendations could damage your engine.
