I've been following the diesel versus petrol debate, which seems to be concerned mainly with the overall costs. I've bought diesels for the last 25 years, preferring them for several reasons, not least being safety. I've twice got very close (though not involved, thank goodness) to accidents involving cars in flames, and been horrified. I once read that if the first cars had been diesel then petrol would have been banned when it was first invented due to safety concerns, because it ignites so much more easily. And I also read somewhere that committing suicide by running a hose from the exhaust won't work with a diesel engine because it doesn't produce enough carbon monoxide. I assume running the engine in a closed space might also be safer than with a petrol engine. What do you think?