I think, for one thing, that the idea that the U.S. is behind the stratospheric increase of petroleum products in Europe is sinking in. Putin had no reason to do it. Ukraine lacked the resources to send divers down to that depth (beyond expert divers experienced in explosive munitions, there’s the matter of a decompression chamber), and an American Navy ship was in that exact location during exercises months before. Quite a coincidence, no?
Maybe Europeans would like to be warm next winter and to be able to afford to use their cars.