Explosions tonight at oil depots inside Russia!

[Amishman]

21. I saw some speculation a while that lack of imported supplies could result in contaminated oil

Russia has had struggles with keeping oil deliveries sufficiently pure (chloride contamination ruined 5 million barrels worth in 2020). Chlorides are used to help extraction but need to be removed again afterwards as they are very corrosive. With western supplies, parts, and equipment drying up; they will struggle to properly maintain and operate their petroleum industry.

If they do have large stocks of unusable oil, it would be tempting to destroy it in this manner. It hides their contamination issue, and drives up prices.