Parts will be direct from Japan, no big deal, better parts come directly from Japan anyway. Local suppliers here don't normally stock the higher-end performance parts. Nissan Australia will be selling them in 2009.
Fuel consumption is 12.2L/100km, similar to the average late-model Holden Commodore, but with 3 times the performance, handling, technology, drivetrain efficiency, and everything else. Life's short, why think too much about fuel cost

I already use around 200 litres of 100 octane fuel in a day at the track anyway
