This year, I let my O.C.D. get the better of me. Sure, a squirt of fogging oil down the plug hole is mandatory, but it doesn't do squat for the crank case internals. I mean, I fog the boat engine till it stalls out, and then fogging oil the cylinders, and drain the carbs through the bowl, but you can't actually do that to a chainsaw. So what I came up with for my saws is...
1) Start and warm up the saw ( after cleaning it first ).
2) Dump all the fuel out.. pump the primer bulb, and drain out another dribble. If no primer bulb, pull the saw over a few times.
3) Add half a tank of "true fuel", or similar canned gas product.
4) Start the saw with the air filter off, and stall it out with fogging oil. ( The crank case is now also protected).
5) Dump out the canned fuel into a glass jar, and pump the primer bulb. If no primer bulb, pull the saw over a few times. Then dump again.
6) Remove plug and fog the cylinder. Pull over a couple of times and re-install plug and air filter.
As far as I can see, this method oils the crank case guts, and the cylinder. It also ensures that whatever little bit of gas mix is still in the system is the stuff that's supposed to be good for two years in the saw. Theoretically better than E-free Premium with stabiliser.
The gas engineered gas that was dumped out into the glass jar, can now be used for the next saw, and the one after that, etc. When all is said and done, the remaining fuel goes into the only saw that I keep fuelled for the Winter, my " tree down across the road" rescue saw, a Echo 355T. So there's no waste of that ridiculously expensive engineered fuel.