Stihl ultra is only FB rated. Many video's on this problematic oil from Richard Flagg, well worth watching. This oil will carbon up the piston/rings in no time at all.
Neither HP has no JASO rating and ULTRA has a FB rating not a very good rating Stihl is not in the Oil business. Use Amsoil or Shaeffer 2 cycle oil those are the best 👍👍
I use stihl hp super
It’s great stuff!
Stihl ultra is only FB rated.
Many video's on this problematic oil from Richard Flagg, well worth watching.
This oil will carbon up the piston/rings in no time at all.
Neither HP has no JASO rating and ULTRA has a FB rating not a very good rating Stihl is not in the Oil business. Use Amsoil or Shaeffer 2 cycle oil those are the best 👍👍