Here is what I am currently getting on LPG for those interested in it.
(straight from the onboard computer in the car)
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Engine 3.8 Litre V6 24 valve
Distance logged 2000 kilometres
Total fuel used 208 litres
Environment Mixed freeway/city cycle
Average speed 75 klm/hr
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total cost $127.92 (average 61 cents per litre)
This was 10 trips from Torquay to Collingwood and back.
This was approx 60 sets of traffic lights per trip 20 through Geelong and 10 along Hoddle street...each way.
So a mix of highway and city driving.
I am pretty impressed.....it works out at 10.5 L/100klm
Or in the old language about 27 miles to the gallon.
Not bad for 3.8 Litres of full sized car.