No. Oolong tea is in its own category. Oolong is usually described as somewhere between black tea and green tea and has a quite distinct flavor. However, herbal oolong teas can be found; they simply...
Most loose tea in the supermarket is black tea, and by "loose" they mean that the tea leaf is not wrapped up in tea bags. Any type of tea can be packaged loose or in tea bags. White, green, wulong...
Supposedly, given green tea's higher EGCG content. But the real impact of a cup of green tea a day on long term weight loss is probably going to be pretty minimal.