Ha, after having three moon roof vehicles in a roll over a 20 year period, finally knocked some sense into my head with reduced roof clearance, would hardly have occasion to open that trap door in the first place. If a sealed system, maybe another, but an overflow system depending on two or four drains, that even if working properly would freeze up during an icy rain. That water only had one more place to go, on you. But debris will cause the same problem.
In my long career, had to do a lot of traveling that meant using rentals, ha, would check the oil level on these things, would look like tar what little was left there. Also a bad boy, would not drive them as nice as my own vehicles, would stay far away from rentals.
Used vehicle's? With nine kids going to college purchased a bunch of these, from trade-in value, least another thousand less, always need extra stuff, tires and new brakes can cost a thousand, other suspension parts, sensors, ABS problems, can't repair radiators anymore, cheap plastic and aluminum foil. In the last 20 years or so, parts prices have become outrageous, even doing the work yourself.
Never thought I would say this, actually cheaper to buy a new vehicle than a used one. Especially if you can't do the work yourself. Only options I really want is cruise and AC, but not even AC much anymore, with this global warming, temps are getting cooler. Only used our AC a couple of times last summer, but wouldn't have died if we didn't have it. But if you have young kids, gotta have AC. Sure adding a bunch of worthless convenience crap to these new cars, and not very convenient if you can't even roll up a window.
Ha, for a 50's car, a new hydramatic transmission was only 150 bucks, but were built so well, never had problems. Today, more like $4,000 and made out of crap. By getting into build your own sites, can easily add another 10-20K bucks to the price of the vehicle adding junk to it with the same body and drivetrain. Not only does your payments take a high hike, but so does the cost of your collision and comprehensive insurance. But that cheaper vehicle will get you there, with a lot less headaches.