I was good enough to lend my post hole digger to a friend, along with a full gallon of mixed fuel. His plan was to fence in his acre property nearby in FL. (all sand, so the holes are easy)
Not sure what he did to screw it up, but it runs terribly and rattles like mad now. Despite giving him plenty of mixed fuel, I suspect he somehow managed to put regular gas in it. I don't have much of a use for the thing now, so it really does not matter.