If you have a car that tends to break down quite a bit, you need to bear in mind that a floor jack is something that can be really helpful for you at this time. Because of this, you would likely want to consider buying one as soon as you possibly can. That said, you need to learn a little bit about the responsible practices that go into floor jack usage so that you can avoid problems that can occur without you even realizing that they are about to get in your way.
One of the most essential aspects for using a floor jack in a responsible enough manner is to never jack it up to the limit. All floor jacks have a maximum height that they can go to, and when you bring it up to this height there will be a lot more pressure being placed on its least structurally sound point. This would greatly increase the chances of breakage and the like, something that can bring the car crashing down on you and causing no small amount of bodily harm.
It is understandable that you might want to push your floor jack a little bit, but doing so is just too risky. Try to keep it to around eighty percent of its maximum height. That would eliminate any and all likelihood of it straining under pressure. Even if it doesn’t break instantly, it can cause tiny fractures in its structure that will slowly get bigger over time until eventually your floor jack is more or less unusable at least from a safety perspective.