10w40 semi-synthetic will be a bit thick for the L15 engine. I suggest using 5w30 viscosity. You can buy a gallon of Xteer FS 5w30 at Lazada for around 1200. You can also use Zic or Mag1.
If you want to use regular mineral oil, just go to a Honda casa and buy their base 10w30 mineral oil. I think it is priced below 200 per liter. Honda used to offer a budget 1k change oil service using that oil. That's good for around 5k km.





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