Automobilista and rFactor1 tank capacity is wrong
The games Automobilista and rFactor 1 do not provide tank capacity data, so the Application uses the highest fuel amount as the tank capacity during a session. E.g. if you start with 30 liters the tank capacity is 30 liters too. If you drive around and have only 15 liters left, the tank capacity is still 30 liters and you have half of the tank left.
If you refill during the session and the new fuel amount exceeds the tank capacity the tank capacity is updated.
This approach does not give you the correct tank capacity during the entire race but at least you can use the fuel widgets at all.