NEW YORK - Oil prices fell Tuesday after U.S. Federal Reserve Chairman Ben Bernanke indicated that more interest rate cuts are unlikely, comments that sent the U.S. dollar higher and raised questions about oil's ability to reach new highs in the short term. Gas prices rose slightly to a new record near US$3.98 a gallon.

In a speech via satellite to an international monetary conference in Spain, Bernanke suggested that further rate cuts are unlikely because of concerns about inflation. Since last year, a series of Fed cuts designed to shore up the economy has led to a protracted decline in the dollar's value against the euro. That helped feed the record runup in oil prices as investors bought commodities such as oil as a hedge against inflation.

On Tuesday, that effect reversed; the dollar gained ground on Bernanke's comments, and investors who'd bought oil as part of a hedging strategy sold. Also, a stronger dollar made oil more expensive to investors dealing in other currencies.

"With Bernanke implying that there won't be ... more interest rate cuts, that removes one contributing factor that's been driving oil prices," said Rachel Ziemba, an analyst at RGEMonitor.com in New York.

Light, sweet crude for July delivery fell US$2 to US$125.76 a barrel on the New York Mercantile Exchange. Prices peaked at a record US$135.09 on May 22.

Concerns about falling demand for oil and gasoline are also weighing on prices, analysts said. Recent data from the Energy Department and Federal Highway Administration and several surveys suggest high prices are cutting American's appetite for fuel. A new survey by RBC Capital Markets finds about 90 percent of Americans have made changes in their daily lives to counter high energy prices, including driving less and taking public transportation more often.

On Tuesday, General Motors Corp. said it would close four truck and SUV plants in the U.S., Canada and Mexico as surging fuel prices hasten a dramatic shift to smaller vehicles.

Oil prices also fell Tuesday on forecasts that domestic oil and fuel supplies rose last week. Analysts polled by energy research firm Platts expect the Energy Department to report that oil inventories rose by 2.7 million barrels last week. The department's Energy Information Administration will issue its weekly inventory report Wednesday morning.

Kurdistan's Prime Minister Nechirvan Barzani said Tuesday that Iraq should boost crude oil export capacity to 6 million barrels a day, three times the amount the country is exporting now. But Iraq's oil industry is plagued by a lack of modern equipment and training after decades of U.N. sanctions, war and Saddam Hussein's rule. The country plans to boost oil output from 2.5 million barrels a day to 3 million barrels a day by the end of 2008 and 4.5 million barrels a day by end of 2013.

At the pump Tuesday, the national average price of a gallon of regular gas rose 0.3 cent to US$3.978 a gallon, according to a survey of stations by AAA and the Oil Price Information Service. Prices are 82 cents higher than a year ago, but have stalled in recent days on what once appeared to be a relentless march toward a national average of US$4 a gallon.

Prices are already higher than that in many parts of the country, and average more than US$4 in 12 states and the District of Columbia. Still, prices may not reach the US$4 mark nationally if oil prices retreat.

Diesel prices have fallen in recent days; the average national price of a gallon of diesel slipped 0.5 cent Tuesday to US$4.78 a gallon, according to AAA and OPIS. Diesel prices, which peaked at a record US$4.792 a gallon on May 30, have pushed up the price of food and consumer goods transported by truck, rail and ship.

Many analysts have long questioned whether high oil prices could be sustained; many blame speculative investing fueled by the falling dollar for a near doubling of crude prices over the past year.

"Oil prices have been rising for almost a year on good news, bad news, or no news, a clear sign, in our opinion, of a bubble which we believe will burst eventually," said Fadel Gheit, an analyst at Oppenheimer & Co., in New York, in a recent research note.

But few analysts have been willing to call an end to the rally. Several times this year, oil prices have dipped from a new record high, only to surge back to new records. However, Edward Meir, an analyst at an analyst at MF Global UK Ltd., said in a research note: "Looking at previous corrections, crude prices would have made up most of the lost ground by now and in this latest round, we do not seem to be recovering as quickly."

In other Nymex trading Tuesday, July gasoline futures fell 2.67 cents to US$3.364 a gallon, and July heating oil futures fell 4.5 cents to US$3.677 a gallon. July natural gas futures bucked the rest of the complex, rising 32.6 cents to US$12.295 per 1,000 cubic feet as forecasts for high temperatures throughout much of the U.S. raised demand for natural gas from electric utilities.

In London, July Brent crude futures fell US$2.03 to US$125.99 on the ICE Futures Exchange.