When I said have someone else run the heck out of it, I meant with hood off and uou in the passenger seat.
In terms of the dye, you add the dye to the crankcase, go run the car 50 yards hard, and check it, then 100 yards and recheck it, etc. The dye is a guarantee to find the source of the leak(s) if you have a system for checking it starting with a short interval to longer intervals. Have done it many times and it has always worked. Give it a try and you'll see what I mean.