As a few other people have said, it all comes down to maintenance.
My VN 3800was still going strong on original motor and 500,000++ kms (I say 'was' because we're dropping in a VR V6 now, just for fun)
Dad's VT Ecotec is well over 400,000km now, that causes us no problems really (one gbox rebuild but it's been great since then)
Mum's VY Tonner Ecotec had around 90,000 when she bought it. More than its fair share of issues.
Sister's VX S Ecotec had 80,000 when she bought it and a couple of issues but nothing too serious
My old 5L takes the cake as the problem car. I had a whole shitload of things I had to fix on that car, never quite ended up finishing them all. That was at 260,000 when I got it, car had gone to **** thanks to the last 2 owners.
kms mean nothing.