Yeah, Glenn
I came to the same conclusion, and at the time my mileage was nearer 17K per annum.
It's obvious that gas would be highly effective in a 4.5 litre Range Rover, which has plenty of space for a large LPG tank, and also only does about 12-15 mpg on petrol
The economics of it are also more favourable if you were a taxi driver, or someone doing 20 to 30 K miles a year.
For us normal fools, we just keep paying through the nose for petrol.
Joe
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Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
Plum Dangerous
White X2 RVR Mitsubishi 1800GDI.
Vantastic
40,000 miles Jersey Girl