Petrol price increases in Germany

Since five days ago the price of crude has dropped and the Euro has strengthened against the dollar. Yet overnight the price of petrol at the pump has been raised significantly. I guess it's the bank holiday effect.

Not sure if this is right but I was led to believe that Petrol Prices are reflective to the price that is paid at the time it is bought by the companies. So if the price is high when the Companies purchase it, we pay the higher price until the stocks are finished and then pay the lower price. Annoying thing is though, that when the price of oil is high it is increased at the pumps immediately (even if they are still using the oil which was purchased at a lower price).

Perhaps someone can enlighten me if this is incorrect.

It's true that prices have increased dramatically recently, but to be honest the major hike was as long ago as last week. I noticed this because I drive down to Stuttgart quite frequently and usually try and fill up while I'm down there as it's usually a few cents cheaper there than here in the Main-Taunus area, but last week it was just as expensive down there (95/96 cents for diesel). Unless it's rocketed up today, I believe that's still the price at the moment.