"That's a pretty powerful stimulus to consumers," said Adam Sieminski, chief energy economist at Deutsche Bank Global Markets in Washington.
After trading lower most of the day, oil prices staged a late-session surge on the back of a Wall Street rally. Oil investors have been tracking equity indexes as a barometer of global economic health. The Dow Jones industrial average rose 144 points.
Light, sweet crude for December delivery rose $1.85 to settle at $67.81 a barrel on the New York Mercantile Exchange, after earlier falling as low as $63.12.
Prices closed at $100.64 a barrel on the last trading day in September. That gives oil the biggest monthly slide since the launch of the Nymex crude futures contract in 1983. The previous record was a 30 percent drop set in February 1986.
Crude hit a record price of $147.27 set on July 11.
"We're seeing a huge paradigm shift," said Jim Ritterbusch, president of energy consultancy Ritterbusch and Associates in Galena, Ill. "We went from $100 at the beginning of the month to around $65 today. It's quite a decline and shows how weak the demand picture really is."
In August, Americans drove 15 billion fewer miles than they had in the same month the previous year, the largest single month decline since World War II, when figures were first collected regularly.
At the pump, a gallon of regular gasoline fell another 4.3 cents overnight to a new national average of $2.504, according to auto club AAA, the Oil Price Information Service and Wright Express. Gas now costs about 40 percent as much as it did on July 17, when prices hit a record $4.114 a gallon.
Cheaper gas has been a rare bit of good news for consumers rattled by huge drops in the stock market, rising mortgage payments and difficulty in obtaining credit. According to Deutsche Bank research, for every dollar that comes off pump prices, U.S. households save a staggering $100 billion a year
- money that can be spent on other goods and services to help jolt the economy.
Deutsche Bank estimates that the $100 billion would be worth 3 million new jobs.
But even with cheaper energy, Deutsche Bank's Sieminski predicts the weak global economy will weigh on fuel demand well into 2009
- bringing oil to a quarterly average of $50 a barrel for that year.
OPEC and international energy agencies earlier this year predicted oil demand would rise by 800,000 barrels a day next year, driven by growth from developing economies like China and India.
Given the widening economic downturn, Sieminski said those figures now seem wildly optimistic.