A 1933 Chevrolet would not have a 6.2L V8 diesel (or any V8 engine at all, for that matter). Engines in that era were much smaller and less powerful. To find out how much oil a 1933 Chevrolet truck takes, you would need to consult a repair manual specific to that year and model of Chevrolet truck. The oil capacity will vary depending on the specific engine.