Default Mac address change

Hi, first of all, please excuse my english. Now, the question is : is possible to change the MAC of our Moto X...? I used to have a Razr i and i was able to change it. But with this one, i cant. I ve been probing a variety of apps and nothing. I would be happy if someone can give me a hand...! Thanks in advanced....!!

Tipeado desde mi Moto X Cordobés