4 gallons ( 4quarts/1gallon)=16 quarts
12 gallons
17.1 gallons
17 gallons
It has a maximum capacity of 17 gallons but you will never be able to get that much in unless you run the tank dry.
23.0 Gallons
16 gallons
17.5 Gallons
14.5 gallons
8.8 Gallons
5 gallons!
20 gallons
18 gallons