Thanks for your replies guys.

So if my math is correct I'm drinking 33litres per 100km (in uk money I'm doing 150 miles to a full tank of gas - 80litres) which judging by posts on here is way high!

In the Uk petrol is around the £1.08 per litre (au$2!), yes, really! You don't know how lucky you guys are! Gas is about half price so you can imagine I'd like to get as many miles as possible!

But where do I start?

Cheers

Nick