U can change ur engine oil 5k km, 7.5k km, or 10k km up to u if u using good full syn engine oil, but.....does oil filter last til 10k?
Long ago it is recommended oil filter be change every 5k km. Unless u using high quality oil filter, but in our market mostly just a normally good filter.

See wats inside oil filter.

difference of 0.6litre is quite a lot.

My main concern is the transmission oil, even some of my friend who own VW/Audi tend to change their transmission oil at 30k (Half of 60k which recommend by SC)
This type much better?

Update: Proton has made the price of timing belt available on their website

Also, I made a video discussing about the maintenance of the x50 and other major costs that you will need to know if you are out of warranty such as the turbocharger, 7dct gearbox components, carbon buildup, led headlights and taillights, all sorts of sensors and pump and etc2.

According to them no need, or maybe they put in together with the timing belt..

the truth is I think need to change just like what u said to they just want lower the perceived costs.

just like preve and other proton cars, upon reach 100k km after timing belt change mostly will need to change the water pump and tensioner bearing, cos this two parts is wear and tear parts. some waterpump can holds up to 200k km. but some only lol.