I just saw this video about GM engine failures and how they tried to cover it up. It looks like the channel owner is using some sort of AI to create the video, but the content seems real. Maybe they are mixing in some facts with fiction in the video. I know the parts about changing the oil viscosity are real, but the parts about the cover up and attempting to suppress internal leaks I can’t verify. 

https://m.youtube.com/watch?v=OIPlpJjYCZU