By reporting a lower weight Holden is able to run tests etc at lower weights including AS2877 or whatever the fuel economy one is?
This may seem like a small issue, however under AS rules once fuel consumption rises above 10.0l/100km the graduations rise in 0.5 lots, with figures rounded. Say the VT did a 12.4. That would equate to a sticker on the windscreen of 12.5. Then they 'lose' say 50kg and the consumption drops to 12.2 - a small difference. However, the consumer now sees a sticker and brochure figure of 12.0 - a stunning 0.5l/100km improvement.
It's all a game.
I await the FPV Blueprint mag that has an entire article on how weight figures are measured (like HSV did on power figures).
BA'1.5' Pursuit 290
Lightning Strike / Reflective Orange Stripes
'General' Dog - AP's German Shepherd and Best Mate - 02Dec1998-15Dec2003.
'Pepper' Dog - General's and My Little German Shepherd Sweetie - 1996?-02Apr2006.
'Sako' Dog - My Beautiful and Pretty German Shepherd - 2001?-23Aug2006.