I'm fairly sure that my Echo ope's (chain saw, blower, trimmer) will run on 87 or 89 octane 1. Why, then, does the Echo or Tru Fuel containers make such a big deal about their having 93 octane? 2. From what I've read, Echo 2-cycle oil is about as Good as you're going to get but for infrequent residential use, is it worth the extra couple of dollars per container as compard to Tru Fuel? I'm starting to use these canned fuels as I can't get ethanol-free fuel locally and I want to see if I can tell any difference using these products vs my own mix Thoughts?