Welcome NESCO ..... ? how much oil? I'd suggest, right now putting luminescient dye in the coolant and checking your crankcase dip stick with a black light and remember oil is lighter than Water/coolant and will float above the dye so you will want to look at the very tip of the dipstick and after three hours of run time after the addition of the dye crack your oil pan plug with the black light on and look for coolant. It will be a bright lime green to yellow if your using commercial universal dye tracer for black light detection.