I’m more worried about increasing road rage incidents with people carrying guns in their car in this country to care about car doors slamming hard.
Very low down on my list of problems – even first world problems. Now … my wife letting the door to the garage slam shut rather than closing it quietly? THAT is an issue.
@TiggerDad of corse you can find a lot of things to worry, but this threat is about manners, as you said “but manners are a big thing in my culture”.
Older cars had doors that would not close completely if you did not close them hard.
Presumably, car doors are designed not to be damaged by closing them hard.
Old VW Beetle (the kind with the air cooled engine)?
So I close the door to my Lexus gently. And guess what? It’s neither closed NOR open. So I have to push in the door to release it from car door limbo. And that doesn’t work all of the time, so I spend a few minutes screwing around with my car door until I can close it and my car door and I can both get on with our lives. Next time I’ll close it more firmly.And I also keep my car clean even though I’m an American.
We don’t want to fall out – this way, we make sure it is adequately shut.
That may be a tad on the fearful/paranoid side, but it probably has something to do with it – for some door-slammers, at least.
@“International Dad” Are you my husband? 
This is a pet peeve of his.
Couldn’t we play this game with lots of things in lots of different countries? I don’t imagine all people from the US slam car doors. I am sure I could find a “why do people from international Dad’s country question” but I won’t because it is a generalization and could be offensive.
I am not sure if I slam my car door or not -but I have never had to get the door repaired.
@International Dad, more than one person has explained to you that they MUST close their car doors really hard to get them to close properly, yet you still insist that this is simply a matter of manners?
The idea of this post is not to be disrespectful to anyone, I have seen some interesting responses from users that I think understood my question. For example, an answer that I was expecting if there was some technical reason, for example, with pressure fluctuations due to changes in climate between seasons, if it does not close the door firmly, it starts to get out of adjustment, etc. In my country there are no stations, therefore that could be a valid and necessary reason to do so.
How this post is being taken the wrong way I ask a moderator to please close it, I offer apologies to anyone who has been offended.
“Old VW Beetle (the kind with the air cooled engine)?”
My sister had one of those! It was totally awesome and horrible all at the same time. Bright orange, super fun, no AC and large parts of the floor had rusted through. We once had a debate at a stoplight about whether one of us had enough time to reach down through the floorboard holes and pick up some change we could see on the road. Good beach car, though - you didn’t have to worry about getting sand in it.
What part of the US do you live in? Most families I know share cars until the children are grown and drive them until they can no longer be repaired. And very few own more cars than there are drivers in the house.
Why would we care? Cars are expensive. Repairs aren’t cheap either and the time they take is inconvenient.
What kind of maintenance is visible to the naked eye? You may be able to tell when people rotate their tires, but I don’t know how you’d tell if they flushed their antifreeze or changed their oil.
I don’t spend a lot of time peering into other people’s windows, so I wouldn’t know how clean someone else’s car was unless I rode in it. I’ve seen cluttered (generally cars belonging to families with multiple kids who all seemed to have numerous ECs), but I don’t think I’ve ever seen filthy. However, if numerous people in your area own more cars than there are family members to clean them, I can see how maintaining cleanliness could be an issue.
MODERATOR’S NOTE:
Doesn’t work that way. We close threads for ToS violations or similar reasons, not because someone does not like the direction the conversation is going.
As a partial answer to the question, it’s not necessarily a US thing. The older car my parents had when I was but a lad required a bit of a push/pull to close the door.
Our MDX has pretty insulated doors that took a bit of effort to close. Never noticed slamming was a particular issue in our house.
@skieurope thank’s, you are right.
Just I didn’t want somebody felt irrespected.
I have an older Mustang, and there is NO way I could close the door quietly. Well, at least the next time somebody gives me a nasty look in a parking lot, I can ask them if their name is @InternationalDad.
@CottonTales :))
If is me, Can you give me a ride? I never benn in a Mustang before. I promess close the door hard too. :))
Well I for one completely agree with you! I was thinking today and watching people close their doors today.
We tend to slam the door as we walk away v.s. turning towards the car and deliberately shutting the door.
One is a “SLAM” the other is more of a “THUD”.
@austinmshauri I know many families in many states owning more than one car per driver. If you search this forum, you’ll notice that some posters are also in the same category. According to wiki, the US has 0.91 vehicles per capita, indicating more cars than drivers, unless you believe that every resident drives regardless of his/her age or lifestyle. Even if this statistics includes some business vehicles, the US is still way ahead of many countries. https://en.wikipedia.org/wiki/List_of_countries_by_vehicles_per_capita
I am not going to derail this thread by getting into a point-by-point debate, but I repeat from experience that many cars I’ve seen were grossly neglected. And why not if a used car in decent running condition can be bought for as little as several months salary, or simply received as a hand me down for a nominal fee (and yes, I’ve also seen examples of both). This is quite different from many years of sacrifices and savings to afford a clunky old car, which is often maintained and repaired by a driver who cannot afford a mechanic. I am really happy for the Americans, and I don’t hold their good fortune against them, but let’s not pretend that the experience is nearly the same. And btw, I did not take the OP as a statement that all Americans do this, it just happens more often, therefore it’s more noticeable.