I seriously doubt you have any idea what it would take to set one off.

Depends on if it has finished product. If it did, it could be set off with just a few set placements of small arms ammunition. An RPG would be sooooo easy.

Even with just Crude on board, it could be a mess in only a few minutes. Just gotta know where o put it.

I seriously doubt you have any idea what it would take to set one off.

Ever see the end of the movie 'Syriana'?

Ka-BOOM!

But that was a LNG tanker. They make for a very big bang :)

Yeah, but I can't imagine that a tanker full of refined products would fare much better :(

Even in an empty tanker, I would imagine that the fumes remaining would make a pretty spectacular bang.
For the maximum impact though, perhaps a partially empty tanker would be the easiest to explode - plenty of fumes to set things off.