Well that's a scary thought! Wasn't aware that was an even an issue with 09s. I'm still out in the desert for a few months, but I don't recall the coolant looking bad. It looked, um, "coolant-y"? A clear, maybe slightly yellowed fluid (that could have been the reservoir plastic). No glistening on the top, like you'd see from oils floating on top. Also had the radiator coolant drained and filled at the same time, dealer didn't mention anything off about it. If they were up for some money I'd think they would point out a problem like that.