I usually change filters every second oil change - usually somewhere between 2 and 4 oil changes per year depending on km. Eg, have done 10,000 km this year in my Tuscon, and have changed it 3 times and will change once more shortly (seems to have some gunk in there)
Meanwhile, the Camira does maybe 800 km between 6 month oil changes, with the filter done at the same time due to being an old engine and presumably worn rings
I use standard ryco filters (again, I try to get them on special), but have used valvoline as well.
