The oil capacity of a 350 V-6 engine can vary depending on the specific make and model of the engine. However, in general, a 350 V-6 engine typically holds around 4 to 6 quarts (approximately 3.8 to 5.7 liters) of oil. It's important to consult the owner's manual or check with the manufacturer for the exact oil capacity for your specific engine, as there can be variations depending on factors such as the engine's design and any modifications made to it.