If you don't mind my asking, how much is a quart of the new stuff from the dealer? If it's not much more than the old stuff it may be worth it. You only need a quart, correct?

Yes, 1litre (close to a quart) is enough.

Can't really help with price, mate - I'm in New Zealand! I paid about NZ$85 fwiw... ;)

Yes, I should have looked before I asked...
Just out of curiosity, I checked, $85 NZ dollars equals $58.39 US dollars... Its expensive no matter where you buy it.

Thank You.

Sounds about right. I work on doubling any advertised USA price when looking at stuff as by the time I add freight costs and our 15% import tax, double seems to work out about right.

Because of these added costs, buying local can sometimes be cheaper, as in this case. ;)