Elusive coolant leak from hell.
So I'm losing about a cup or two of coolant a week. The radiator stays full to the top, but the overflow tank is down about a cup or two every week. I've just been filling it with distilled water because it never freezes where I live anyway, but I gotta figure out where the coolant is leaking from so I can fix it and refill with the proper mixture. I can see that it is dripping off of the oil pan and oil filter, but I can't figure out where the leak originates from even after wiping everything down and waiting for the leak to reappear. Is there a common coolant leak point on these trucks? (95 5.0 5spd.)