Part of the difference as well is that gas (or petrol) requires a spark to light. Diesel uses compression instead.
Years ago, a business colleague found out the hard way that there are service stations around Paris that make a living out of fixing cars that have had diesel put in them instead of gasoline. That was around the time he learned that the French word for "gasoline" was "essence", and not "gazole". [img]smile.gif[/img]
Fortunately, manufacturers have been getting smarter and diesel gas tanks now have a wider opening (and diesel pumps have a wider nozzle). It won't fit into a regular gas tank hole.
Ermmm... okay, keep any following comments clean, please. Just realized what kind of shaky ground those comments are on