Old XC wagon + 3,000km trip over 4 days = ...?

[Neeek]

Opinions are required…

Can a $600 XC Falcon 500 station wagon (250 x-flow, 3 on the tree) travel safely and without mishap down to Canberra (from Brisbane) and back again over the course of a weekend?

Yes, Wags is going on a road trip this weekend and just about every person who is aware of this trip has upon hearing the plan raised their eyebrows, done, a little whistling, told me it’s been nice knowing me and departed from my company shaking their heads.

Bought for the above sum in July this year, Wags has only received the following treatment in preparation for such a huge undertaking, not all of which were actually "preparation" as such:

1. Four new tyres.
2. Four new shockies.
3. Lowered front springs and BIG aftermarket front swaybar.
4. Alternator replacement (the old one was on its way out, so…).
5. Stereo install.

Fluids have been checked and are to the levels required. I drive this car every single day and it’s never skipped a beat.

Finally, any guesses for how much fuel I’ll use? I’m reckoning three and a half tanks (70 litre tank) each way.

Sometimes I wonder which is more silly – driving down to Canberra and back or taking part in a 24-hour mountain bike race somewhere in the middle..?