Depends on how its driven, most people wont touch a Commodore close to or past 300,000km
But.. Ive had a (my mothers then given to me) 120Y Coupe click back to 000,000 twice, once when we first got it and again when we owned it. Also had a TRX with a L20B in it got over 1,000,000km and go back to zero only a few years ago.
Without hard accelerating and frequent servicing I cant see why a SV6 cant do the same.