Pay attention to newspaper advertisements from Giant or Tesco for engine oil offers, especially for the shell helix ultra fully synthetic, around RM130-140/4L. Or if you're cheapskate (like i once was), get the tesco brand fully synthetic oil for RM80-90. I ran it in my old vios for 12,000km.

Unlike the continental counterparts, Japanese engines are generally pretty accepting to whatever you pour into it. Very hard to make recommendations la....