Hello and welcome to 2CarPros. Just to jump in, if you have no overheating concerns then I would suspect the oil cooler has failed. The cooler is located just above the oil pan on the block. If it has an internal leak and coolant and oil has mixed then I recommend you replace the cooler. Flush out the cooling system with water and replace all rubber hoses. Example both upper and lower radiator hoses, heater hoses, and oil cooler hoses.
I have seen mechanics replace the head gasket for this concern only to end up been the oil cooler leak. It is not a common fault but it does happen. I would start with that. And the reason you need to replace all rubber hoses is because oil does some serious damage to the hoses where you will have more headaches. Hope the information is useful and keep us posted please.
Sunday, September 8th, 2019 AT 12:15 AM