The real price of gasoline (petrol) was between US$5.60 and US$15.14 in the U.S. in 1997, according to this report. Here's the executive summary:
http://www.icta.org/projects/trans/rlprexsm.htm
and here's the full report in PDF form:
http://www.icta.org/projects/trans/realpricegas.pdf
If gasoline does indeed cost US$15.14 a gallon with oil at <US$14/barrel (as it was in 1997), then the oil accounted for only 33 cents of that cost back then. Oil would have to go to >US$600 before it accounted for half of the real cost of a gallon of gasoline, if the high figure in this report is correct.



