Arjun N. Murti remembers the pain of the oil shocks of the 1970s. But he is bracing for something far worse now: He foresees a “super spike”  a price surge that will soon drive crude oil to $200 a barrel.

Mr. Murti, who has a bit of a green streak, is not bothered much by the prospect of even higher oil prices, figuring it might finally prompt America to become more energy efficient.

An analyst at Goldman Sachs, Mr. Murti has become the talk of the oil market by issuing one sensational forecast after another. A few years ago, rivals scoffed when he predicted oil would breach $100 a barrel. Few are laughing now. Oil shattered yet another record on Tuesday, touching $129.60 on the New York Mercantile Exchange. Gas at $4 a gallon is arriving just in time for those long summer drives.

Mr. Murti, 39, argues that the world’s seemingly unquenchable thirst for oil means prices will keep rising from here and stay above $100 into 2011. Others disagree, arguing that prices could abruptly tumble if speculators in the market rush for the exits. But the grim calculus of Mr. Murti’s prediction, issued in March and reconfirmed two weeks ago, is enough to give anyone pause: in an America of $200 oil, gasoline could cost more than $6 a gallon.