Mild concern, no performance issues.
Full coolant flush a few months ago, fresh DexCool. Checked the coolant yesterday. Was a little low... the cap seemed to have some Old Bay Seasoning on it. Old Bay Seasoning seemed to cover the whole couple inches down to fresh clean coolant. I wiped it all out and cleaned off the cap... topped it off and poured a little more into my overflow, which was a bit low.
Is this just DexCool reacting with oxygen because it was a tad low?
Anything I should be worried about?
