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If there is a frequent need to add oil to the engine, as well as oil spillage, it can be concluded that:
The frequent need to replenish the engine oil level, accompanied by visible spillage, indicates a sealing failure in the lubrication system. The oil pan, which serves as an oil reservoir at the bottom of the engine, and its sealing gasket are the components responsible for containing the lubricant. If there is poor sealing in these elements, oil escapes to the outside, causing spills. The water pump is part of the cooling system and not the lubrication system, so its failure would not cause oil leakage. The use of oil that is too fluid could increase the engine's internal consumption, but it would not be the direct cause of physical spills to the outside, which are always due to sealing failures.