Eight students each donated about a pint of blood. If 2 L of blood were used, what is the remaining amount of blood, in fl oz?
There are 33.814 ounces in 1 liter, so 2 liters is equal to 2 * 33.814 = <<2*33.814=67.628>>67.628 fl oz.
Eight students each donated about a pint of blood, which is equal to 8 * 16 = <<8*16=128>>128 fl oz.
If 2 L of blood were used, then the remaining amount of blood is 128 - 67.628 = <<128-67.628=60.372>>60.372 fl oz. Answer: \boxed{60.372}.