It makes me smile that where I work, if there's a job on that requires a fuel tank draining, the guy who owns a diesel car always volunteers.
gr4techie,
I drove a Mercedes 240D for about a year and ran it only on Jet A-1 with no other issues than slightly more difficult starting in winter.
We also ran the tractor and forklift truck on Jet A for their entire life in the hangar.