So I changed the oil in my 2002 Honda Odyssey yesterday and the used oil in the pan had tanish/brown streaks running through it. There were also some frothy bubbles. It looked like something was leaking into my oil... any thoughts? Here's a pic...

 

welcome to the forum. Possible radiator fluid. after your oil change, monitor your rad fluid level. also checking your oil fill cap, it would also show a bit of brown color or water on the cap.

 

Yep ,as stated, coolant in oil.

 

coolant was my first thought. I've been checking the levels and their fine. Also, the radiator is only 2 years old and the coolant is still bright green... no rust coloring at all

 

Also the oil filler cap looks perfectly normal

 

It's possible that there is some condensation in the crank case,I would drive it a few hundred and change it again.

 

could be a blown head gasket has the car overheated lately ???.