I just tried out my new Motive a couple of nights ago. I ran almost a quart through, and used a container with volume marks to measure approximately 4 oz. each wheel - more at the rears than the fronts.
My procedure was to start with the wheel furthest away (RR) from the master cylinder. I read somewhere that was the way to do it. I started each wheel at 20 psi and pumped it back up before doing the next.
If you have two-year old fluid, I would definitely siphon it out of the master and refill, rather than pushing it through the system.
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe