I guess. In my case the oil i would be putting in the motor would just be sitting in the coil container for that exact same amount of time. In my mind, more oil in the crankcase means less exposed metal in the crankcase. *shrug*
I'm asking this about lawnmower engines here, but I suppose this also applies to snowblower engines too, and any other gas powered machine.
I usually top off my tank before each use, unless its late in the season and I'm explicitly trying to run the machine down on gas. And I keep my gas...