I dropped the FF of Engine Oil after 1,000KM (600 Miles), and replaced with fresh DINO, then did again after 4,000KM (2400 Miles). Then I switched to M1 Synthetic and changed it every 3,500 Miles as per the warranty and now I change my Amsoil ASL 5w30 every 6,000 Miles.
I have 150,000KM (90,000 Miles) on my SUV now and it isn't using a drop of oil and the UOA's come back really good.
I didn't drop the FF of Transmission fluid until 30,000KM (18,000 Miles)