Why don F-Body LT1s and LS1s get synthetic oil at the factory like Corvettes do?
Some Corvette LT1s do not have a engine oil cooler as the f-body cars do. Since this may cause the Vette LT1 to run somewhat hotter, synthetic oil is used for it’s ability to withstand higher temperatures without thermal/ viscosity breakdown. Although, Corvettes with the performance suspension are supposed to have oil coolers.