Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.
mines done 150,000KM
had to replace the thermostat & water pump.
although this may have had something to do with me using John Deere tractor coolant (for cast iron engine blocks) on an alloy engine, the alloytec. lesson here is, dont do what i did, as it costs you shite loads in parts and more specifically labour (thermostat is in THE most inaccessible place ever on an alloytec)
but apart from that, no issues with oxy sensors or anything else.