If the price per barrel drops, you don't see the effect for a month.

When the price goes up, within days it goes up at the pump, too.

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k