Gas prices have jumped nearly 20 cents over the past two weeks, approaching the all-time high, according to a survey published Sunday.

The average price of a gallon of self-serve regular is $3.76, the Lundberg Survey found. The previous survey three weeks ago found an average of $3.57.

That means prices are now just 35 cents — “within firing range” — of the all-time high of $4.11 set in July 2008, said publisher Trilby Lundberg.

“This doesn’t mean that we will get there,” she said. “Crude oil will decide.”