The Subaru engine head gasket problem usually manifests itself – from the reports we get here — as a cooling system problem. So I wouldn’t overly-worry about oil-related health problems and the Subaru engine. If you want to worry about something, worry about the effect on your pocketbook and the inconvenience of not being able to use the car, in the event a head gasket replacement job is needed. Also remember to put things in perspective: head gasket failure doesn’t happen to every Subaru engine; when it does it is a straightforward albeit expensive repair; and, who knows, the head gasket problem might be entirely solved on newer Subarus. If you generally like Subarus and they have one that meets your needs on their lot, priced to your budget, suggest to definitely consider it.