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2026. 6. 30. 작업

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What is causing my oil pan to fill with a mysterious fluid?

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Used motor oil should smell like oil, or oil and exhaust. If you can smell gasoline, you have fuel in the oil. You said the car sat for a long time. If this engine has not been modernized with fuel injection and it has a carb, the fuel in the bowl may have become thick and sticky as it sat, or turned into a solid. This could be preventing the float valve from fully cutting off fuel flow when the bowl is full. Fuel can then overflow into the intake manifold and find its way into the crankcase through the cylinders and rings. It will be in the liquid state and not atomized, so it's hard to burn and will seek a low point with the motor oil. Suggest you open the carb and see if the fuel bowl is over-full. If so, you may have to clean the carb to stop the leaking. EDIT: And by the way, you can identify fuel in the oil by placing a drop of oil on filter paper (like a coffee filter) or even a paper towel. Observe the drop for a few minutes and see how it spreads. If it spreads into a uniform