Sounds about right. Usually I just fill it up to the top, run out the bubbles and air, then fill to the top again. Repeat if needed.
And some auto parts stores (most) will take it and dispose of it correctly, if not, go outside in a complete rage and dump it all over their parking lot (making sure to splash it on the windows, front door, and personal vehicles). Hahaha. No, dont really do that, just make sure it gets taken care of, if you cant find a place, check the phone book, their a bunch in there.
DD- 1995 YJ 2.5L, Cat delete, 19lb injectors, 30/9.5r15
Trail Rig- 1994 YJ 4.0L, Rubicon Express 4.5inch lift, 1inch body, D30 Aussie, 33/12.5/r15 Cooper Mud Terrains, front bumper, rocker guards