White sludge under oil cap | 2016+ Honda Civic Forum (10th Gen) - Type R Forum, Si Forum - CivicX.com
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Milky inner oil cap but oil dip is perfectly fine should I be concerned or is it nothing? : r/mechanics
Possible head gasket failure? Pic of the inside of my oil cap. Need diagnostic help.. | IH8MUD Forum
White sludge under oil cap | 2016+ Honda Civic Forum (10th Gen) - Type R Forum, Si Forum - CivicX.com
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