12L.

The way to check the fuel tank capacity of a Foton tricycle is generally to observe the reading through the fuel gauge in the car. If there are no other problems, the fuel volume value will be truly reflected on the fuel gauge. The fuel gauge of the instrument generally has 5-6 bars, and each bar represents the remaining capacity of the car in the fuel tank. Generally, you need to refuel when there are two bars left on the fuel gauge to avoid running out of gasoline halfway through the drive.

International standards use L (liter) as the unit of calculation for the fuel tank capacity of fuel vehicles. Different countries also have corresponding standards for the fuel tank capacity of fuel vehicles.

In my country, the fuel tank capacity of fuel vehicles is stipulated to be 95% of the rated value, but the actual capacity is generally greater than the nominal capacity depending on the actual situation, so there is no need to worry about the fuel tank of fuel vehicles being smaller than the actual one.