Quote Originally Posted by snowyskiesau View Post
My 3.5 tonne van has a 2.7ltr, 5 cyl diesel and gets 10 - 11 ltr/100km depending on where it's used. I tend to drive at the speed limit and some of the regular routes I take are quite steep.
It doesn't seem to make an enourmous difference to fuel economy if it's carrying a load although I don't carry stuff that often over a reasonable distance to have any accurate figures for it.
That seems to be about the average. As long as LPG stays at 50% or less than the price of Petrol or Diesel, I think the maths work out OK for me with a 4.7Ltr V8 with auto transmission.

Bob