No problem.
Gas prices have reached $1 a litre; that was the psychological barrier for everyone, the line that must not be crossed. Now that the price has gone past $1, you can play with it, and we see prices of $1.06, $1.09, $1.15. So every time the price of a barrel of oil goes down, the refining margin goes up, and the price remains stable.
Is that how price stability is maintained?