The diesel takes 7.5L of oil. 20W50 is fine for our environment, but so is 15W40. I would stay away from 0 or 5W oils because they have a tendency to shear more. I’d love to use non-Toyota oil, but everyone is saying they will void my warranty if I use anything else. 🤷🏽♂️
Again, stick to the manual for oil change intervals. There is NO reason to change earlier than 5000km. It’s a waste of money and many oils have an additive that forms a sacrificial barrier on high pressure areas only after being run in for a few thousand kilometers.
I’ll be sticking with 7,500km or so for my oil changes since I don’t do short trips and the oil has plenty of time to warm up and burn off any water or fuel that gets into it.