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01/05/2023 9:03 pm
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Hi Scotty! I have a 2011 BMW 550i xdrive. After idling, my car lets out dark smoke from the exhaust. Some say its the valve stem seals that allow oil to seep into the exhaust chambers.
I remember you mention an additive that would possibly lubricate those seals and temporarily fix the Smokey issue. I just cannot remember the name of the additive. Can you please help?
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01/05/2023 9:16 pm
"Dark smoke" can be due to an overly rich mixture. Oil smoke is blue.
You're probably thinking of ATP AT-205 "Reseal" but that's not likely to do anything for bad valve stem seals, if that's the problem.
