much unnecessary deliberation about my own head gasket, there is only one definitive way to tell, IMHO. (the coolant chemical tester is too hit or miss for me). winfred suggested using a compression gauge spark plug adaptor hooked to an air compressor. you might want to ask him for the pressure, i don't know it. if it is breached, you will be able to make bubbles in the rad overflow tank. was the volume of the oil more than it usually is? could it just be crap in the collection container maybe?