How many pounds of fuel load does the auto balance system maintain between wing tanks?

The auto balance system in the T-6 aircraft is designed to maintain a fuel load difference of no more than 20 pounds between the left and right wing tanks. This is crucial for ensuring balanced flight and optimal aircraft performance. By automatically transferring fuel between the tanks, the system helps to prevent an imbalance that could affect the aircraft's handling characteristics and stability. A difference greater than 20 pounds could lead to adverse flight conditions, so the system is calibrated to activate and adjust the fuel load accordingly. Thus, the correct answer accurately reflects the operational design of the auto balance system.