I always thought you'd want it turned (oriented) so that when you unscrew the old filter to change it out, it doesn't drool everywhere...
Hi Grandpaul,
When I made up my mind about the setup it was out of the two options, 1. a small amount of oil leakage when changing which will be pretty easy as there is plenty of room to slide a tray under or 2. dealing with the tight fit so the oil lines are not kinked. I decided option 2 was for me but weighing up the pros and cons when you fitting the filter to fit yourself is the way to go.