Or worst come to worst, buy a few extra plastic tank and refilled it in KV before balik kampung and so on.

So at least don't need to worry can't find Euro 5m diesel.

IF you want to drive a diesel car that preferable euro 5 and insist on using euro5 then I believe by that time you already accepted the fact that euro 5 is not widely available outside certain regions.

Then, such chores are expected and shall be tolerated without any issues haha.