...look for? Ok long story short: I have an 02 Mazda Protege. I've owned the car for two years, never had any problems with the fluids. I just had to completely fill the antifreeze two months ago and it's now almost completely empty again. (I hadn't had to fill it at all prior to that. Between being serviced and my father checking stuff it may have been filled twice prior.) So my question is does an engine "use" more antifreeze as the car ages like it does with oil or do I need to check for leaks? (I haven't seen anything yet.)