Hedgerow
HACK
Saws have an extremely short stroke. The hot gasses are escaping before they're completely burnt, So "Ya get what ya can, when ya can" and 87 gives it a tad quicker.. But if all a man can find in non-eth, is 91, then by all means, use 91...You will hear no argument from me! Id love to hear what you have to say about the subject and and advantages of using 87 vs 93 in these engines? thanks
Most will never notice the difference...
But gooey fuel lines suck, no matter the brand...