You've been eating quite a number of hats here lately, ME_Andy
I do not see oil every being replaced until it runs out. There is too much in the way of money and power worldwide for oil to slowly fade away.
Eddie25, I payed over $4.00/gallon for 93 octane less than 3 years ago. I filled my Escort up yesterday. It was $2.899 for 89 octane.