The gasoline tanks of semi trucks vary in capacity, but they typically store 125 to 300 gallons of petroleum. The tractor has a gasoline tank on either side, and the fuel is evenly distributed between the two tanks to keep the weight balanced.
Semi truck fuel tanks are not standard, but are customised to the buyer’s requirements. For example, a 2011 Kenworth T660 truck with two 120-gallon gasoline tanks for a total of 240 gallons can be acquired used. Tractors with larger gasoline tanks are useful for cross-country drivers or truck drivers hauling heavy loads. For balance, some truck builders use larger gasoline tanks on one side over the other.
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