If I upgrade a loan car, and later on I bought that car, the upgrades would already be in the car or I have to buy them all over again?
Yes, they will remain on the car.
You should get a message like this when entering any event where you have a loaned car, which helps in further explanation:
Thanks for answering mate!
I was thinking that only in the concept of 'loaned' it was permanent but once you owned it, this would changed...
Happy to be of some help😊
The benefit is you can get cheaper upgrade discount and later you can get the car in event archive.
What do you think?