Avgas in the Lawnmower
I have never done that as I don't have a lawn, BUT I have put Jet A1 in a Diesel Landrover, a 50 50 ratio mix with normal DERV, I am told if you ran it on neat A1 the injector pump would fail due to lack of lube.
Well it went on for thousands of miles and on tour in southern Spain and back so it's Thumbs up to Jet A1 in a diesel landrover.
The other good thing was it is clear (unlike tax free RED diesel) so it came out yellow when mixed with normal road fuel when dipped by customs.
The latest one is mixing diesel with sunflower oil from the supermarket....