That's a lot of oil changing. I do mine every 20,000 kilos and that's somewhere between 7,000 and 10,000 kilos ahead of manufacturer's recommendation.... although I done it after 9,946 kilos once during COVID '19 anall, the rationale being that almost 14 months had lapsed since it's previous change - despite manfacturer recommendation being 24 months.... so again well ahead of schedule.