I have a Toro self propelled lawn mower that I am getting ready to put away for the season. The manual says to run it until empty then put some oil in the spark plug chamber. I read an article that states you should not drain the but instead fill up with fresh fuel that has stabilizer added. Thoughts or recommendations?
The "article" you linked to is written by the manufacturer of STA-BIL, a brand of fuel stabilizer. So I would take the entire thing with an enormous grain of salt.
I don't see how you can go wrong following the advice of the lawn mower manufactorer. Personally for my small engines I switch to stabilized fuel sometime in the fall so that it works its way through all the hoses and into the engine, then when I'm done for the year I run it dry. That way virtually all the fuel is gone and whatever is left should have stabilizer in it.
With the methanol in the fuel I would drain and empty the bowl , over time even with stabilizer some of the fuel evaporates and draws moisture then you need a rebuild or that has been what happened to me. I have found fogging oil to be the easiest way to winterize pull the air filter and fog it until it dies then drain the fuel, In spring fill with fresh fuel and a little shot of starting fluid, mowing in minutes... I did review the add they said nothing about methanol that eats the fuel lines or collecting water, just buy their product in fact start using it a month prior , even though the manufacture might say to drain the tank , great sales pitch.
One advantage of having the tank full of fuel is that empty fuel tanks and lines may be more likely to collect condensation and rust than lines and tank filled with gas. I imagine that could be an advantage with a car, especially a high mileage car. But with a lawn mower, aren't most of them plastic tanks and rubber lines?