Today I found I had a leak. Coolant leaking all over the place. Found out it was a metal hose that connects rubber hose to a hose that runs to the cabin on the passenger side of the car. Did a leakdown test and compression test and they all came out great. What could be the oil in the coolant problem? Headgasket but wouldn't that show up on a compression or leakdown test? Completely confused.