EcoTec 5.3L V8
Hey yall, I recently installed a JL oil separator and wanted to check the collection after the first week. To my surprise, I found this. What does this mean? What do I do? I just bought this truck almost a year ago to the day. my truck is a 2014 GMC Sierra 1500 SLT, 4x4 5.3L with over 210K...