delo gold, and change it between 3500-5000 whatev satisfies you..... and dont take it to tuning, it doesn't need it(just a checkup preferably at toyota every 30-50k km) again whatev u are satisfied at, just oil, filter change and u are good......., it'll require overhaul between 250k(abused, petrol like use of throttle and revs) to 400k(if u use the torque curve effectively).