I find it strange that oil companies talk about intervals at all. It seems an American thing that they print on the bottle that it is a 10.000 mile oil. I have never seen that here across the ocean.Come on.
So answer a simple question then. Why do the oil companies say the same thing??? Wouldn't they make more money if everyone changed oil at 5,000 miles?
Something that also wonders me, Toyota prints in the manual of the 4th gen hybrid that it uses 0W20 (but others are allowed) but here in the Netherlands Toyota advises to use 5W30 because of the milder climate and because of higher loads for example when pulling a trailer.
For the 5th gen it might be different since the oil pump seems to be calibrated for 0W16. The 5W30 advice is given by dealers owned by the importer and by independent Toyota dealers.