Petrol (gas) or Diesel?

[Walkabout]

While following the threads in here I get an occasional feel about the preferences of owners for certain types of fuel - usually the obvious one about fuel economy (although quite surprisingly, to me, some owners say that their petrol vehicle gives better fuel economy than some other diesel vehicle).

So, my question is, what is your preferred fuel for overlanding/travelling distance?
If there is some kind of reasoning for your choice, which does not have to be entirely logical of course, then so much the better.

Personally, as a bike rider, I would always prefer to come across a petrol vehicle while travelling, for the opportunity to cadge some "essence" when my tank is low.