Traces of coolant in the oil could come from seapage from a lot of places other than the headgaskets. If the front cover bolts were loosened for any reason, like a V4 install or waterpump change, some coolant VERY easily seem into the pan.
Personally, I'd just change the oil to a good synthetic and reduce the amount of coolant in the water just in case. But that's me
Personally, I'd just change the oil to a good synthetic and reduce the amount of coolant in the water just in case. But that's me