Quote:
Originally Posted by Alain e92
I have not drained the oil yet. but i don‘t think it is coolant since there is no coolant missing.
I might just get 8 new injectors and change the oil again before i risk an engine failure. But not sure yet.
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Throwing 500 dollars worth of parts based on a wild guess is not the way to troubleshoot this issue. However, changing the injectors out or having them cleaned because you have 100,000+ miles isnt a terrible idea
One of the most common overlooked reasons an engine "makes oil" is by driving it short distances a lot. Condensation builds up in the crankcase and the engine never actually gets hot enough to burn off all the water that collects in the oil. This water condensate can also affect the oil level sensor's ability to measure correctly.
Also, the oil level sensors in these cars aren't the most accurate, and an oil level sensor that is starting to fail could cause this same issue. Here is a great read if you want to be an oil level sensor connoisseur:
https://www.meeknet.co.uk/e64/oil-sensors.pdf
A stuck injector that is dumping enough fuel into a cylinder to start filling the oil pan will always trigger misfire codes, go into limp mode, run rough and have raw fuel smells from the exhaust. What happens is people start to troubleshoot the misfire/limp mode code(s), and while they are trying to identify what the cause is (plug, coil, etc.), the stuck injector (depending on severity) either starts washing the cylinder wall with enough fuel to score the cylinder and reduce compression OR it can quickly hydrolock the cylinder, causing major rotating assembly damage. Either way, you typically have much bigger symptoms than slightly elevated oil level.