There is a recommended service interval for the PHEV. Oil change after so many kilometres. But if you drive mostly electrically, you surely don't need to follow that schedule. So, what to do?
gwengler
To the OP - The oil degrades over time and even more so in the PHEV as the ICE often doesn’t get up to temperature to boil off condensates etc.. check the underside of the filler cap… sometimes looks like greatly sludge like you have a head gasket failure!! Would definitely recommend intervals at least what is recommended irrespective of how many miles you do on EV.
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