SteveSr
Addicted to ArboristSite
Sorry for another oil thread. There has been some recent discussion on this forum concerning the correct oil for Stihl 4-mix engines. The conventional thoughts are that Stihl Ultra (a JASO-FB oil, now an old formulation) was designed specifically to work in the 4-mix engines and that newer formulations JASO-FC,FD should not be used and could actually cause issues if used in 4-mix engines.
Our local trail club has both chainsaws and weedeaters in the tool stable and we provide fresh mixed fuel during regularly scheduled workdays. It is therefore advantageous if we only had to use one type of mix oil.
So I did some international travel via the internet to Stihl's German website and found and downloaded the most recent manual for the FS-111 (some translation required). I also visited Stihl's USA website and downloaded the same FS-111 Owner's Manual.
The German manual indicates that JASO-FB, FC, FD are recommended/acceptable oils. The USA manual recommends Stihl Ultra for compliance with EPA and CARB requirements. In other words, Stihl likely used Ultra when they did their EPA and CARB compliance testing. So it would appear that if an FD oil will work in the EU/Germany it should also work in the U.S.
Our local trail club has both chainsaws and weedeaters in the tool stable and we provide fresh mixed fuel during regularly scheduled workdays. It is therefore advantageous if we only had to use one type of mix oil.
So I did some international travel via the internet to Stihl's German website and found and downloaded the most recent manual for the FS-111 (some translation required). I also visited Stihl's USA website and downloaded the same FS-111 Owner's Manual.
The German manual indicates that JASO-FB, FC, FD are recommended/acceptable oils. The USA manual recommends Stihl Ultra for compliance with EPA and CARB requirements. In other words, Stihl likely used Ultra when they did their EPA and CARB compliance testing. So it would appear that if an FD oil will work in the EU/Germany it should also work in the U.S.