What oil goes into a 1978 Chevy 350?

For a 1978 Chevy 350 engine, it is generally recommended to use a high-quality conventional or synthetic motor oil with a viscosity of 10W-30. Some owners may opt for 10W-40 for warmer climates or heavier loads. Always check the owner’s manual for any specific recommendations or requirements, especially regarding oil type and additives. Regular oil changes are essential for maintaining engine health.