Wants to ask because I can’t believe it.

Hello guys: My new intruder C 1500 T is a great thing. Chewed at the beginning of August 2015. I’m generally happy with it. Well. I’ve done the experiment several times and I can’t believe the result. I can’t fill up until I can’t go any more. I can’t drive until the tank is empty but without a drop of gasoline. That’s 221 km. Here it’s not too much or too little Spri. The problema I’m refueling until I can’t go any more and I can’t ever go into it anymore. but the tank is 18 liters according to the seller. IS THE POSSIBLE Suzuki has drunk here and Intruders C 1500 T sold with three liters of small tank as indicated? And if ya. What can you do about it? MfG Angelo