This is likely spot on. There seems to be a lot of questioning about whether Ukraine has money or not in this thread which is rather odd.
Like Scrllock has said, a lot of people in Eastern Europe work on their own cars. Way more than in the likes of the UK and the US. It's no surprise that there is a good range of choice for oil as it probably sells very well. There is also a much larger amount of old cars as well which are just not worth paying to get oil changes done on when someone can just spend £30 on some oil and chuck it in themselves. (Older European cars are really easy to work on meaning it's easy to just do it at home).
It's interesting to see the viewpoints of people from the US who think that Ukraine has been somehow "ripping them off" when in reality they are facing one of the largest armies in the world and have been doing a dam good job of stopping them from taking their whole country so far. You have to remember, Ukraine is one of the largest countries in Europe. These is around 750 miles from some major cities to the front lines so they are in the most part unaffected.
There are also wealthy individuals in Ukraine, like in every country. The videos of clubs etc maybe true and likely are real videos. But remember, just because a country is at war doesn't mean EVERY other life event stops taking place. For example during WW2 parties were perfectly common all across the UK, in London, even when there were nightly bombing raids by Germany.