Per spec it would takes 60 sec at 2500RPM to fill the system. Colder temperature would cause the car to lower sooner after the engine has been turned off. Depending on how quickly the car is droping, it may be nothing or it may be leaky shocks and/or level controllers. Good luck.
I have just replaced the front sway bar to try to cure the lower left front - it didn't work. $1300 out the window for nothing. And to make it worse, the dealer damaged the level controller (a $700 part) and now I am in limbo because the dealer claims that they didn't damage it.