Hi there ive recently bought a xj executive in tip top condition and am going to convert it to gas,but not over here as they charge too much. I had my last car converted to lpg and it was the best thing ever ,but i had it done in belarus [only because i go there 2 times a year as i have a farm there] but also it only costs£480 to have done,1/3 of the price of here .well worth doing mega savings on fuel bill and that means your giving less in fuel tax to the government to waste