Propane powered tightass mobile

Although I love golfs I always seem to end up with Vauxhalls as my daily drivers, prob due to the fantastic depreciation on them    I've had my astra for about 3 years and last year decided to convert it to lpg using the AC autogaz stag 4 kit bought cheap off ebay with a second hand tank which was only a year old also cheap off ebay the whole conversion cost around £500 and with LPG costing 70.9p it's saving me about £20 every time I fill up ( or about £60 every 1000 miles)since I don't get quite as good MPG with it. It does seem excessive spending £500 on a £600 astra but it's saved me that already and I can always rip it out and fit it to something else ( It'll work with the ABF in my mk1 or any other 4 cylinder car with electronic ignition)