Oil Ratio??? Help Please

[02RX]

New to the site, and was needing a little help please. I have an 02 RX ski. Runs excellent, but seems like it is using way to much oil. Could someone please tell me some possiblities that it could be. And how often should a person have to fill the oil resivor? I have ran roughly 5 tanks of gas, but have put dang neared 2 gals of xps-2 in already. Any info would be greatly appriciated. Thanks