I don't think that's true because the car engine itself plays a role in determining your service interval. BMW's can go 15K service cycle easily and Japanese makes are normally 5-10K. If we have the money then yes, can even change monthly but to optimize the investment, 10K change for fully synthetic seems to be reasonable. I do agree that "5,000km or 3 months whichever comes 1st" should apply for mineral oils
It is expensive I just wanted to try out and if I don't get a lot of difference, I'll switch back to something cheap.

10k km/6 mths, whichever comes first lor.

Hey, how come no supporter of the "nonid change oil one, mechanic cheat money oni, just top up oil when level is low enuf adi" here ha?

I know that some turbo car owners just use some cheap semi-syn that they can get their hands on, as the oil will be evaporated easily, so, no point wasting their $ on $$$ fully-syn oil. Frequent top-up is probably also needed.