I would strongly advise AGAINST using any ether products to start an aircraft engine. The reason they seem to become dependant on it for starting when it's used too much is that it's so bloody explosive that it buggers the piston rings and so the engine looses a lot of it's compression. Have had to use it in the past to start a ratty old company van on frosty mornings - it used to make the engine knock like a ba$tard for a good 10 minutes after starting. When there's only 1 engine keeping you aloft, the last thing you want to do is pi$$ it off!!