I've used the car in one render, and I loaded it into the scene after V4 and her clothing, but before Sydney and her clothing.

Just having the car in the scene caused Poser to slow down, and that was well before I rendered.

I'm not going to use that car again unless I'm trying to waste hours and have nothing better to render.

________________________________________________________________

If you're joking that's just cruel, but if you're being sarcastic, that's even worse.