i'll be running the FS-2500 (bypass) on my car with the full flow filter & relocation kit.
the full flow will get most if not all the soot out of the oil (low flow), while the full flow ensures that larger particles are kept out.
they say that the full flow filter can last 20'000km, and the FS-2500 can last 5'000km (and this is on a big rig!)
so i estimate 20'000km for the FS-2500 filter (approx $23 each) and 60'000 for full flow or more. will only be using the best, expensive oil, and so extending the drain interval for that stuff is imperative.