Oil in coolant

Hello, how do you know there is engine oil in your coolant? Could it be something else? Transmission fluid? Is there a transmission cooler perhaps? That is a possible cause of leaks that can intermix coolant and an oil. Check your transmission fluid perhaps for a sign of coolant intermix. I can't say for sure, but thinking engine oil is far less likely than transmission fluid. www.repairpal.com/repair-shops