Yes I realise that, i'm just comparing the $/litre ratio, which is obviously more important when looking at different fuel systems. I can travel about 350km for under $30 (60 litre tank based on LPG prices on < 50cents/litre). I'd be interested in knowing how far people can travel on ULP. It seems to be around 400-450km for around $65 (50 litre tank on approx $1.30/litre), so a fair amount more compared to my LPG tank.
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