Hey everyone I need your coolant advice. I have caught a raw deal. When I bought my Cobalt they replaced the engine under warranty due to a blown head gasket. Now 60k miles later I am picking my car up today after blowing another head gasket. I work at Advance Auto and I was talking to some of my customers and coworkers and some were actually saying that Pentofrost is actually gentler on head gaskets. Before I go spending nearly $100 on Pentofrost I wanted other owners advice on which coolant is doing the best job for them. Okay have at it!