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Rust on the timing chain. Gasoline in oil.

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 In the Porsche Cayenne S 4.5 955 car, after unscrewing the oil filler cap, there is sludge on it and a bit inside on the chain.  After removing the dipstick, nothing special except oil.  You can feel gasoline on the cap and the oil filler.  Rust is embedded in the chain.  The car does not show any symptoms, from time to time it shows error P0456 (Evaporativ Emission System Leak Detected (very small leak), but it is checked by a normal diag, I do not have PIWIS.

The car became unused for 3 weeks. I don't know if rust could form after this time if there was moisture inside. In the second photo you can see part of the chain after starting and stopping the car. 


Photos(Wait a moment for better quality): 


Edited by Lukas Grom
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On 4/8/2020 at 3:48 PM, Lukas Grom said:

No one had a similar case of gasoline in oil?


Fuel in the oil at appreciable levels is usually the result of either leaking injectors or a totally failed sump evacuation system (these engines are designed to run at around 5 inches of water vacuum signal in the sump to aid low tension ring sealing).  Without the proper vacuum level in the sump, water and fuel will accumulate over time.


I would scan the engine for fuel trims to look for leaking injectors, and test the sump vacuum level with a digital manometer.

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