There are 8 oz in a cup, 32 oz in a quart, 128 oz in a gallon and, therefore, 256 oz in 2 gallons, so a 50:1 ratio would be a hair over 5 oz of oil.
(55 gallons) x (128 fluid ounces per gallon) = 7,040 fluid ounces
20 gallons = 2,560 ounces.
8320 ounces is 65 gallons.
13.2 gallons is 1,689.6 ounces.
169 ounces is 1.32 US gallons.
That is 2.375 gallons
249.6 ounces in 1.95gallons
There are 640 ounces in 5 gallons.
Twelve and a half ounces.
80 fluid ounces is 0.625 gallons.
15,360 fluid ounces is 120 gallons.
63 US gallons is 8,064 ounces.