Head gasket or intake gasket. Are you using coolant or water?
50/50coolant at first, but i didnt wanna waste money on any more coolant so i started adding water. No change - same results. System needs a good flush anyway since there is a lot of copper pellety-looking sealer floating around the radiator.
If it is a bad intake or head gasket, woulnt the coolant end up inside the motor since there is no visible accumulation on the outside or on the ground? If it does end up inside the motor wouldnt it milk the oil pretty quick? The system maintains pressure once the engine is turned off, and stil no leaks. If it were to leak from the head (gasket or a crack even) wouldnt it make the car start harder, or even hydro lock it? Car starts perfectly fine every time...