Originally Posted by
rickair7777
Recip airplanes with "TURBO" decals used to be prone to getting fueled with jet juice. I think the FAA ultimately issued ADs to remove all those decals.
I think there are supposed to be red decals around the filler hole on the aircraft that specify what type of fuel goes in, and the different nozzles as mentioned above, but obviously, nothing is 'fool proof'.