Clutch Fluid Leak - Master Cylinder Leaking Behind Dashboard Carpet

Clutch fluid reservoir losing fluid over a 150-mile drive, dropping from full to half full. Brake fluid reservoir remained full, indicating the leak was in the clutch hydraulic system between the clutch master cylinder and slave cylinder.

The clutch master cylinder was leaking internally, allowing brake fluid to seep behind the carpet in the driver's footwell area where the clutch pushrod connects at the back of the master cylinder.

Moderate confidence — Original poster confirmed this resolved the issue