OIL rose for the first time in four days yesterday, but traders questioned whether the gains were sustainable.

Benchmark oil for April delivery rose 70 cents to finish at US$90.82 a barrel on the New York Mercantile Exchange. Brent crude, used to price many kinds of oil imported by US refineries, gained US$1.52 to end at US$111.61 a barrel on the ICE Futures exchange in London.

Oil rode the coattails of global stock markets. Stocks rallied as Chinese Premier Wen Jiabao confirmed the country's annual growth target of 7.5 percent and retail sales rose in Europe. A number of European indexes rose 2 percent or more. In the US, the Dow Jones industrial average shot to a record high.

Oil is still down more than 6 percent over the past two weeks. That's helped push down prices at the gas pump. The average price for a gallon of gas fell a penny overnight to US$3.74, and is now 3 cents cheaper than a year ago.

Some traders think yesterday's oil trading is just a pause in a downward trend.

"The ability of Brent and WTI to rebound back to above US$110 and US$90 suggests to us a bear market that could be in a pause for a while before resuming a decline that could carry down to about the US$104 and US$85 areas within the next week or two," said Jim Ritterbusch of the energy consulting group Ritterbusch and Associates.

As this week goes along, oil traders will be monitoring fresh information on US supplies of crude and refined products and the latest government data on hiring.

In other energy futures trading on the Nymex:

- Wholesale gasoline added 5 cents to finish at US$3.15 a gallon.

- Heating oil rose 5 cents to end at US$2.97 a gallon.

- Natural gas was flat at US$3.53 per 1,000 cubic feet.