As per the title really? I run it on LPG and am certain that it is using WAY too much fuel. I only get around 10 MPG from LPG, I don't really run it enough on petrol to know what kind of figure I get.
What sort of MPG should I expect from it? Most of the time I use it for journeys of medium length-I am just after an average sort of figure that I should expect as I am fairly sure that even for a 3.9 V8 I should expect more than that!
I have the vehicle booked in for a service of the LPG system, the chap reckons this is the most likely reason for the poor fuel economy. If this doesn't fix it what other likely causes are there? Lambda sesnsors have been suggested, are there any other places I should be looking?
Thanks in advance!