The Ravenol Dealer in the german Oil forum stated that Ravenol produced 10 ( TEN! ) 20 Liter jugs of this particular 10w-60 batch. This 20 Liter jug size is not Popular, but neverthelss, that is not indutrial scale production, thats more like "Handmade".
A batch of oil is mixed up in a big container, then that is used to fill bottles, jugs, drums, bags etc... depending on the orders they have and what they expect will be ordered going by history. If someone has this in a bulk oil tank they might have gotten some straight into a tanker truck even. All it means if they made 10x 20l jugs is that it's not a popular size. and it sure isn't going to be their best selling product so they won't be making huge amounts at a time.
But it does make me wonder how QC works at that facility.