Perhaps it should be renamed "After run oil, but only if your engine is not going to be run for several months...:

I should have clarified my statement, I do not see a need for it during the flying 'season' but for my planes that will be hangared for quite a while before being ran then I will add it to those engines - just to be safe. IMHO it's an expense that I am willing to part with, considering the cost of a new engine.

One question, if I am going to be flying within a few weeks of running an engine, should I drain the tank anyway?