hi all just had mine lexus is200 done. and no problems it runs lumpy when cold but tha was expected, when temp is on half i dont know im on gas no differant what so ever, as for the fuel gauge, mines the same but i think i be keeping £5 of petrol in the boot till i run out, had mine converted by www.professautogas.co.uk what a good job and excellent after service. and £1200 all in 1 day... quick and cheap. like lpg...
as for all the rest of the bad points 48p a litre not £1.10 a litre now... the saving is alot.
as for valves burning all valve seats get hot even on petrol.
flashlube is just another way of making money, u need to buy the oil so cost goes up and it will get burned in the pistons so wont touch your valves. do the math. its a brain wash.
if your car is missing maybe the butchers who done the gas didnt drill the injectors in far enough. if he did fix it he wont tell you would he... blame the tool not the workmanship...
morrel of the story, you drive a luxury car, that is awsum on fuel (better than modern diesels) which i am sucked of seeing and changing turbos, knock the trc off and go for a blast in the rain... FUN @ half the price!!!!! :D