jenn7

I have a 99 Subaru Outback with 160,000 miles I bought it with a replaced enigine in swap for 30,000 Japanese engine car has always leeked oil and we were looking under hood about a month ago and found that the coolant reserve was filled with oil . we flushed reserve and emptied radiator where there was no oil, just in the reserve. Put new coolant in and when checked a few days later the oil was back. Does anyone know if this is a head gasket problem. Would appreciate some input. Thanks!!