HC, I was being somewhat deliberately provocative in my post. I've seen pilots flying in excess of half an hour in the cruise VFR (non existent work load) with an engine oil pressure gauge reading zero and not noticing until it was pointed out to them (engineered to see how long before a response). Perhaps the manufacturers could save a bit of money by just providing idiot lights as in our motor vehicles. A sign we have become a little too comfortable with the reliability of our machinery?