Did I miss something in an update?

I just got on after a couple weeks and it seems 90% of my Gr3 cars need oil changes (some needing overhaul and rigidity), including the ones I don’t even use. I check most the cars I use before logging off so I know I didn’t just forget, let alone forget all of them. Is this part of an update (oil sitting too long) or just an unlucky glitch? None of my drift cars need any maintenance and they get flogged