Being using it for 25K KM, to be honest I do not feel any different vs proton fully synth

Not sure how do they feel that, I myself is using it and the reason i bought is because the grade oil lube the R3 fully synthetic has is actually graded ilsac gf-6a while proton lube is graded at ilsac gf-5.

The best way is to do used oil analysis which myself not yet done but have kept some sample from my previous serivces.

see Quazacolt pinned topic on the main F&F forum about lubes

Also, if you noticed petronas dont really sell ilsac gf-6a grade lube in Malaysia but it is listed in API webpage.

So i presumed this particular grade is only available overseas petronas lube.

My car still under warranty too so when i change my lube I just show proton global services receipt (got from them directly) as proof that I bought it officially via proton. Cant really do that if you want to change lube to motul or liqui molly while car is still under warranty

Yup, call and inform ori S/C you went to and if safe to do so, go back for them to rectify. Most likely air stuck within system? Was the fan running?

Something like this;


But if work just done by S/C, better to go back instead of DIY just in case if any other issue cropped up due to their error...