Conor
"Bob's your Uncle"
I just do this one time as a guide on the cars I drive every day to give me an idea how long the oil really last. Or if I want to know if I have a bearing failing or leaking head gasket.
---------- Post added at 12:15 PM ---------- Previous post was at 11:21 AM ----------
It will not drain the pan pulling the filter off, you will just loose what is in the filter it's self, maybe a little more.
Regardless, there is still no point in changing the filter and not the rest of the oil. But, "To each his own I guess."