What is the transmission oil capacity of a 1990 F250 with a 5.8 L engine?

The transmission oil capacity for a 1990 Ford F250 with a 5.8 L engine, which typically comes with a C6 automatic transmission, is approximately 13 quarts (or about 12.3 liters) when including the torque converter. If you are performing a filter change, the capacity may be slightly less, around 10 quarts (9.5 liters). Always refer to the owner's manual for the most accurate specifications.