The total amount of fuel which can be carried on an MD83 varies with the version. I (no aux tank) 17740kg, II (forward aux tank) 19960kg, III (forward and aft aux tank) 21160kg. At maximum zero fuel weight (55.3t) you can take 17.2t of fuel up to maximum takeoff weight (72.5t) which is equal to a range of just about 1700 to 2000nm.