After changing the oil and filter in my car at about 7k miles the filter was in a right state so I am doing it at 5k miles now.
The oil will last with the 10k mile changes ok but that filter was very ropey looking. Hopefully it will clean it all up in there once it has been done a few times. I am working away for the forseeable future so clocking up the miles.
Castrol edge for me, in 5w40 flavour.