Originally Posted by
Flch250
Yikes!
When I first heard of that I thought the airplanes were getting fueled with diesel, not that DEF was going in the jet fuel, presumably in the mistaken impression it was Prist or similar.
* IIRC diesel works fine until it gets cold and gels up, so filling the whole plane with it would be more likely to cause issues at altitude than back down in the warmer air.