Never pictured you camping about, MV..........
You could have 50 identical Royal Enfield diesel bikes, running on different fuels - chip-oil from a Chinese takeaway would be ok, but you would want to do another lap straight afterwards, oil used to fry onion bhajis would empty the course of spectators as they all desperately rush off to get a curry when the bike had gone by, oil from a fish-and-chippy would cause Cargo's diet to go out the window....and there would be no room for anything Japanese!