I found a place to buy Premium 100 octane fuel. 140 Flushcombe Rd
BLACKTOWN NSW 2148. Its a United Petroleum station, close to Eastern Creek. We tested it out in my mates car, I wasnt there when he was buying it so I dont know the price. I'd say it makes the car heaps more zippy and rev happy. Try it. My friend also says a full tank lasts longer, dont know about that though.