You should know this, you're a Moderator with many, many, many, many, many, many years of wisdom and experience....:cheesy:
Service station owners also raise and lower their prices based on what it’s going to cost them to replace the fuel that customers are buying today.“These are businessmen who are buying their supply every day, every other day, and it’s replacement cost,” Beth Heinsohn, of Oil Price Information Service, said. “They have to have enough money, literally, to buy the next tanker load that they sell to customers.”
That oil that made the gasoline that customers are putting into their cars today may have only cost $85 a barrel, but the oil that makes the fuel that will replace it will cost a lot more. Customers, then, are paying more now to cover the station owner’s cost in the future.
“For example, between Monday and yesterday, wholesale prices – the cost at which these guys buy their material – went up across the country 11 to 18 cents,” Heinsohn said.
Station owners didn’t pass that full increase along to customers, because they play the averages, knowing that when the price of oil comes back down, their prices will stay up long enough to make up the difference.
http://newyork.cbslocal.com/2011/03/03/why-do-gas-prices-jump-so-high-seemingly-overnight/