No chance..... how long will it take you to cover the miles to warrant the install costs, I have not used $10000's worth of fuel since I bought the car over 2 years ago and I do relatively high mileage? Its not worth it at the moment. That is awful compared to say a LPG conversion.
Also that is only 50000Km on a couple of cars not the install on Thousands of cars so we know it works on may different things.