BP says its only priority is to shut down the Macondo well responsible for the Gulf oil spill. But industry experts say BP could still try to get oil from the well in the future.
Disruptions in supply could push up pump prices, as they did after Katrina.
Uncertainty over oil prices is a factor in Wall Street edginess.
Drivers have been paying about 10 cents more for a gallon of gas since Dec. 31.