Brake problem

2000 GTP, 88k miles

Just recently started having some brake problems. Pedal is very soft, goes way down. Oil has been very low, filled it twice now. Where should I start to investigate this problem? Having good brakes is always a good idea.

Start looking at the brake lines on the diver side of the car. It sounds like you have a pin hole leak in one of the lines. Have some one pump the brakes while you look at the brake lines and see if you can see the leak in the brake lines. Be very careful you should ware safety goggles, brake fluid can blind you.