RE: Engine effects of bad oil?
I have to admit, I was using Outboard oil in ALL my two strokes. I have since been told to, STOP IT! and I have followed this advise, although, I'm not sure why.
My rational was: Outboards are a fairly high performance engine so there oil should provide good wear protection. Outboard oil has good anti-corrosion additives and I buy it by the gallon, so I only had to have one kind of oil in my garage.
I had engaged in this practice for many, many years with no discernible problems. None of my power equip. has ever seen the inside of a repair shop and some weed trimmers and blowers are over 20 years old and there used weekly every season.