@Towerofsong
TBH there are too many accidents involving young men who pass their tests and have free access to a car that they then fill with their mates, go out, are distracted by their mates or drinking or just showing off without enough experience on the road
Part of the reason why we gave our son an old banger. We've over-stated how unreliable and risky it is for it to go too far or too fast! We've warned him not to travel more than an hour at a time "just in case" the engine cooling system fails and it ends up blowing the head gasket. We've warned him not to go over 70 (well we've said 60) even on motorways in case the stress on the engine/gear box/suspension is too much. In fact, we've basically "limited" him to within the ring road of the town where he now lives which gets him everywhere local that he'll need such as supermarkets, football stadium, retail parks, workplace, city centre, golf course, sports hall/pitches etc. Obviously we have no control over what he does or where he goes, but I think we've scared the shit out of him after over-emphasising the risks of him stressing a very old car. He's watched all the Top Gear episodes throughout his childhood and teen years, so it's hit a nerve as he's "grown up" with old cars driven by Jeremy, James and Richard which blow their head gasket due to coolant leaks, or break suspension rods going too fast over bumpy roads, etc. etc., so the kind of "risks" we've told him about he can relate to after seeing similar things happen on Top Gear!
We also ensured he did a hell of a lot of driving us around during the period he was learning and also the year or two after passing, to really build his experience, resilience, etc., on lots of different roads, different driving conditions, etc. He drove more than we did over those couple of years!
We can only hope he's sensible enough not to go drink driving or getting over excited if he's got friends in the car. No one can control that when someone has left home, living a couple of hundred miles away, etc., but he's an adult now and it's up to him if he chooses to risk his life, his job, his licence, etc.