Originally Posted by lightning
It's possible they may be referring to the fuel/oil in the carburettor. I always used to run my 4-stroke engine dry but I'm not sure this would be wise on a 2-stroke as this would mean starving it of oil.
Not really. When it's running it gets oiled. When the oil stops flowing, by definition so does the fuel, & it stops! Also on auto mixing engines the oil ratio at idle is about 200-ish :1, so a couple of seconds at "lean burn" as the bowl empties isn't going to kill it.
I drain mine every time to prevent the fuel in the carb pouring out & sloshing around in the bottom of the crankcase as I drive back down the road.