NEW YORK—The price of oil recorded its biggest weekly drop ever, and a gallon of gas finally pulled back from its record high. So is it time to declare the energy bubble popped?

Experts won’t go that far just yet.

“It’s too early to say we’ve seen the worst of it,” said Tom Kloza, publisher and chief oil analyst of the Oil Price Information Service in Wall, N.J. “We would be Pollyannish if we believe one week represents a trend.”

Still, with oil recording yet another drop on Friday, some industry experts who just days ago thought there was more juice left in oil’s meteoric run are reconsidering. “If this is not the bubble’s implosion, than it’s a reasonable facsimile,” analyst and trader Stephen Schork said in his daily market commentary. “Time will tell. Nevertheless, for the time being we no longer care to hold a bullish view.” Light, sweet crude for August delivery fell 41 cents Friday to settle at $128.88 on the New York Mercantile Exchange—well below its trading record of more than $147 a week earlier. The average price of a gallon of regular gas fell about a penny for the day, to $4.105, according to AAA.