Oil additives are generally frowned upon around here, but is there one that could stop my head gasket from seeping oil? It's only leaking from one small area (oil doesn't even reach ground before being burned). It doesn't leak much...the car burns/leaks less than 1/2 quart every 5000 miles. It's more of a visual eyesore. If the problem worsens, I'll have a new gasket installed.