NEW YORK — Oil futures blasted to a record over $122 a barrel today, gaining momentum as investors bought on a forecast of much higher prices and on any news hinting at supply shortages. Retail gas prices edged lower, but appear poised to rise to new records of their own in coming weeks.

A new Goldman Sachs prediction that oil prices could rise to $150 to $200 within two years seemed to motivate much of today's buying, although a falling dollar and increasing concerns about declining crude production in Mexico and Russia contributed, analysts say.

The Energy Department raised its oil and gasoline price forecasts, but also predicted that high prices will cut demand more than previously thought.

Light, sweet crude for June delivery jumped to a record of $122.73 a barrel before retreating slightly to trade up $2.10 at $122.07 on the New York Mercantile Exchange.

Oil prices have nearly doubled from about $62 a barrel a year ago, which Goldman sees as a sign that the world is in the midst of a "super spike" in oil prices. Analyst Arjun Murti said in a research note released Monday that prices would ultimately force demand to fall sharply.

Not everyone shares Goldman's view. Tim Evans, an analyst at Citigroup, countered Goldman's analysis with a note predicting that crude prices could as easily fall to $40 a barrel as rise to $200 over the next two years because supplies are, as Evans put it, comfortable.

James Cordier, president of Tampa, Fla., trading firms Liberty Trading Group and OptionSellers.com, said Goldman's prediction isn't necessarily new: "We've heard numbers like these out of Goldman Sachs, especially over the last 12 months."

Indeed, it's not the first time Murti has espoused a super spike theory; in an April 2005 note, he predicted the oil market was in the early stages of an unprecedented rally that would send prices from a then-record of about $57 a barrel to $105.

But some investors respond to such predictions by buying, Cordier said.

Meanwhile, in a monthly report, the Energy Department's Energy Information Administration predicted oil prices will average $110 a barrel this year, up $9 from last month's forecast. The EIA also said high prices will cut U.S. demand for petroleum products by 330,000 barrels a day this year; last month, the EIA predicted U.S. petroleum consumption would fall by 210,000 barrels a day.

But strong demand for oil from countries such as China, India, Russia, Brazil and in the Middle East will support high prices and keep global oil demand growing by about 1.2 million barrels a day this year, unchanged from last month's forecast, the EIA said.

A falling dollar today also gave traders reason to buy. Investors often buy commodities such as oil as a hedge against inflation when the dollar falls, and a weaker greenback makes oil cheaper to investors overseas. Many analysts feel the dollar's protracted decline is the real reason oil prices have nearly doubled since last year.

Cordier said investors are also increasingly concerned about falling oil production in Russia and Mexico, which are both major oil producers. And prices are still supported by concerns about supply disruptions in Nigeria, where production at a Royal Dutch Shell facility was cut after a weekend attack, and in Iraq, where Kurdish rebels warned they could launch suicide attacks against American interests to punish the U.S. for sharing intelligence with Turkey after Turkey bombed rebel bases in Iraq on Friday.

At the pump, meanwhile, the national average price of a gallon of regular gas slipped 0.1 cent overnight to $3.61, according to AAA and the Oil Price Information Service. In the Seattle-Bellevue-Everett area, a gallon of regular is going for $3.74, AAA reported.

Analysts are split over how high gas will go; while prices have slipped lower since May 1, leading some analysts to say gas is close to peaking, others predict the fuel will follow oil's upward surge.

"You're going to see new highs for gas prices, probably for the weekend," said Cordier, who predicts an average price of $4 a gallon in the coming weeks.

In its report, the EIA said gas prices will peak at a monthly average of about $3.73 a gallon in June, about 13 cents higher than its previous forecast.