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What would cause car to leak oil when parked but only does it occasionally and small amounts?

Oil Pan Gasket Leak:

The oil pan gasket is a common source of oil leaks. When the gasket fails, it can allow oil to seep out of the gap between the oil pan and the engine block. This type of leak is usually obvious because you'll see a small puddle of oil underneath your car after it's been sitting for a while.

Oil Drain Plug Gasket Leak:

The oil drain plug gasket seals the hole in the oil pan where the drain plug is inserted. If this gasket fails, it can allow oil to leak out of the hole. This type of leak is usually easy to spot because you'll see a small puddle of oil underneath the oil pan after it's been sitting for a while.

Rear Main Seal Leak:

The rear main seal is a gasket that seals the joint between the engine block and the transmission bell housing. If the rear main seal fails, it can allow oil to leak out of the back of the engine. This type of leak can be more difficult to spot because the oil may not be visible from the top of the engine.

Valve Cover Gasket Leak:

The valve cover gasket seals the gap between the valve cover and the cylinder head. If the valve cover gasket fails, it can allow oil to leak out of the top of the engine. This type of leak may be difficult to spot because the oil may be hidden by the engine's plastic cover.

Oil Filter O-Ring Leak:

The oil filter O-ring seals the joint between the oil filter and the engine. If the O-ring fails, it can allow oil to leak out of the filter. This type of leak is usually easy to spot because you'll see a small puddle of oil underneath the oil filter after it's been sitting for a while.

Excessive Heat

In certain situations, excessive heat from the engine can also cause oil leaks. This is because heat can cause the oil to become thinner and penetrate through seals and gaskets that would otherwise hold the oil in. For example, if your car has been sitting in the sun for a prolonged period, it may be more prone to oil leaks.

The occasional, small oil leaks can be caused by a number of different factors. If you notice a leak, it's important to have your car inspected by a qualified mechanic to determine the cause and get it fixed. Ignoring an oil leak can lead to serious engine damage and expensive repairs.

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