this might be a dumb question but does it matter if the coolant that comes out of the overflow looks like foam when it spits it out on the ground. I never noticed it like that before until I topped my 64 fairlane off the other day with some 50/50 coolant/water mix. and and my other cars I never notice any coolant foam. should I swap the coolant out or am I just freaking out. It didn't really look dirty just foamy.