I had to replace the leaking master brake cylinder on my 2006 Vintage today. Not an easy job because the two bolts that hold it are very difficult to access. Anyhow I decided to do a complete fluid change while I was bleeding the air. The original fluid was filthy and it took about one quart to flush all four lines. I did lose some fluid when I "bench bled" the master on the car because of the remote reservoir. I bought the tub two and one half years ago with only 650 miles on the clock so I am sure that the car sat for along time. I now have almost eight thousand miles. My point is check your fluid if its old. My brakes (disc front drum rear worked well before and after the fluid change. Joel