What is the fuel tank capacity on a 1990 Isuzu 4x4 Pickup?

The fuel tank capacity for a 1990 Isuzu 4x4 Pickup is approximately 18.5 gallons (70 liters). This capacity may vary slightly depending on the specific model and configuration, but 18.5 gallons is the standard for most versions of this vehicle. Always refer to the owner's manual for precise specifications.