Different types of Sta-Bil

I do not run any additives since I read a study on additives on this forum that found that additives wash the oil off the walls of the cylinders .
 
So I guess I will be changing the way I do things. This year my plan is to drain all of the gas out of my pressure washer and lawn mower including the carbs of course and I guess dump it in the car to use it up. I'm assuming its also a good idea ot dump a small amount of oil in the spark plug holes as the manufacture recommends?
 
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