Can't help, except to comment that I hate heat, too. I come from a land of snow and ice, now live somewhere that is crazy humid and hot. I hate the feeling of sweat rolling down my back as I'm wearing work clothes. I genuinely fear I sweat more than the average person, or otherwise I don't know how everyone else walks around every day standing this without being as dramatic as I am.

For what it's worth though, I don't think having oily skin is bad for your skin? Actually, I hear oily skin tends to be softer and go without wrinkling longer. You just had the disadvantage of looking oily.