There are 0.03125 US quarts in an ounce.
1/32 of a quart is a fluid ounce.
32 fl oz are in a fluid ounce
Quarts is a much larger volume so one fluid ounce equates to about 0.03125 quarts.
That is 96 ounces
You are referring to the unit of volume "the quart". There are 0.03125 US quarts in a US ounce, or 0.0260211 imperial quarts.
6 US fluid ounces = 0.1875 US quarts