Just to really get your goat heres a sample how gas stations work (from someone I know who owns one)..
Say for example a barrle of oil is $40.
Day 1. Gas station buys a tanker load (8,000 gal) at $1.25/gal and is selling it for $2/gal.
Later that day the price of a barrel of oil skyrockets to $50 and now gas will cost a station $1.50/gal. Station owner raises his price to $2.50/gal. But yet its still THE SAME GAS he bought earlier that day for $1.25/gal. He wont get another shipment of gas until 5 days later.
But yet if the price of oil goes down, teh price he charges doesnt drop right away.
Silly huh?