Originally Posted by thelongone13
My only thought as to the white stuff is perhaps some leftover material from the manufacturing process? Doesn't look like oil in the coolant. I'll check mine, but I doubt I'll yield any results with only about 820 miles on the car.
Yep, that's my opinion. I think this is being over thought. I have had more than one car that had crap build up in the overflow tank. Not one had a serious issue. I think some impurities got trapped in there, from Mfg assembly or something, and takes forever to burn off because its a sealed system. The tank is the highest point in the system, so it that's where it boils off to. Most likely, that's where it stays.