502.00 is fine for top-up & even as a fresh fill under "standard driving conditions & 15,000km service intervals". You can even go a lower spec (it's in the manual) but there are plenty of 502.00 oils out there these days. Of course, 504.00 has its' advantages over 502.00.
That list of oils is misleading for the Australian market. eg: It lists Castrol Edge Sport 5w-30 as being 504.00 but in Aus, the same label is only 502.00.
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