I'm not exactly sure what you mean, but I put a pan under the filter. The location of the filter, which is over the frame, makes it so oil drips right out of the engine, overflowing the filter, running on the frame, and into the pan, making a slight mess.
When I put a new filter on, I lubricate the gasket, and fill the filter as much as I can, then it gets screwed back on.
Filling the filter isn't really that neccessary. On side mounted filters, you can't do it.
I put synthetic in there, for several reasons. One is it doesn't break down, foam, etc. I put alot of kms on my Buick, and sometimes, I like to have a little fun with the engine while driving. It just gives me peace of mind.
No leaks so far, works well.
2009 Pontiac Vibe AWD 2.4
1993 Buick Park Avenue 3800
1984 Chevrolet Citation 2.5 liter four.