There are many different approaches to cars and such, and most people seem to have some pattern to their preferences. The rental, the lease, the fix-up project, the classic/vintage, public transportation, self-propelled, and the buy-then-drive-it-until-the-wheels-fall-off. Historically, I've been the wheels-fall-off type. Upon reflection, I realize that is very similar to my approach to relationships, in general. While I have exited relationships that were "totaled", that moving beyond is usually preceded by a significant amount of repair work, and attempts to get things running well again.
It's worth trying to understand about the people you are connecting with what their approach to "emotional transportation" is. Do they enjoy a simple lease program, where one pops it back to the dealer in 2-3 years, trying not to put too many miles on it, and relatively free from the burden of upkeep? Do they enjoy a good project car, where the joy is in tinkering with it, fixing it, making it better, but only taking it out when the weather is fine, and there's an appreciative audience to ooh and ahh over how shiny it is? Do they like a good spin at the wheel of a rental, with that new car smell, lots of flexibility on the mileage, drive it hard, and turn the keys back over? Perhaps they're a more community-minded public transit sort, such that they want to get on and off at will, without the pressures of ownership, more an open zone on an as needed basis? Maybe they like to buy a vehicle, keep it for years, upkeep it well, and aren't too concerned if it no longer has the same sheen to the paint job, or if there are some quirks to daily operation?
There's room in poly for all these types, and some blend well, but if you're someone who seeks a wheels-fall-off connection, try to be cognizant if you're falling for someone who is more geared for a lease or rental. Some people find little value in approaching relationships with longevity as a priority, living for maximal value in the moment, and when that moment has passed, open to the next ride.