Daryl,
Nice to hear from an Aussie. I lived in Perth from '73 till '77. Nice place-at least it was then. I haven't been back since '85 when they were having the America's cup race.

If Aussie fuel is anything like US fuel the stuff will gum up faster than a rabid roo can run. The gum is nearly impenetrable. I let an outboard engine sit up for a few years and nearly had to dynamite the stuff out of the carb bowls. One drop is enough to clog up a needle valve. I couldn't find anything that would disolve it.

Car buff here in the States that don't use their cars often recommend using aviation petrol. It doesn't have the additives that auto fuel has and you probably won't have to pay road tax on it. Granted it is a bit more expensive, but if you don't use the car as a daily driver it isn't that bad.