um...128
0.42 gallon equals 53.76 fluid ounces.
1 US gallon = 128 fluid ounces
1 US gallon equals 128 US fluid ounces
128 fluid ounces per US gallon.
128 oz
128 fluid ounces
1 US gallon is 128 ounces
128 ounces in a gallon
1/2 US gallon is 64 ounces
128 liquid ounces in a gallon of water.
One US gallon.
Answer64 fluid ounces equals one half gallon.