Chuck 98 RT10· Sexist
If you're not finding and water under the car and the exhaust is not showing any sign of burning fluid then it could just be that the system had air and is replacing it with fluid from the tank. When the system has air and the motor heats up it will take a big gulp of fluid from the tank. Just check it before you go for a drive, fill when necessary. Eventually it will no longer need any fluid. I stopped burping the system and just continue filling the tank over a few weeks until it no longer requires fluid. 200K + miles here.