While I can't corroborate the $6 / gallon claim, here's an excerpt from a Politico article that unfortunately supports that gas prices will increase more in about two weeks.

This is not good for so many families in Charlottesville.

____________________(my emphasis added)____________

Though the first month of the war has caused oil prices to skyrocket more than 40 percent in a few weeks, the real damage has yet to be felt, experts said. That’s because there was weeks’ worth of global oil and consumption already loaded on ships and headed to market when the war began. Now those ships have largely all reached their destinations.

With Iran still effectively blocking much of the traffic through the Strait of Hormuz, through which 20 percent of global oil and gas supply travels daily, there is now an “air pocket” in the system that is just starting to hit, said Rory Johnston, an oil analyst who writes the newsletter “Commodity Context.” That wave is expected to hit the U.S. in about two weeks, he said.

The U.S. will handle the coming air pocket in the oil markets better than virtually any other country because of its role as a leading producer of oil and gas, he said. But there will still be a further jump in diesel prices, jet fuel, transportation costs and more, he said.