I just bought a Stihl string trimmer, at a dealer. I'd read on the net
that Stihl engines require at least 89-octane, but hadn't seen anything
about that in the literature. So, I asked.
The sales guy said that they didn't _need_
high octane, but you should
"premium" gas ("93"), because it's "cleaner", that it's filtered
more, and that "cheaper" gas would gum up the carb.
I was a little surprised at this, but there's a lot I don't know. I
don't see where he had any reason to lie - I was already buying the
Does anyone know whether there's any truth to this?