Sounds all good Grumpy,straight from the text book,I stand corrected.Somethings misalign over time.Most people I know are and have been under the assumption that this was the case.Ive been a mechanic for over 20 years and its something you just know/think you know.Its not something Ive delved deeply into.The manufacturers,drivers,race car drivers and the like would all dispute this.BUT upon reading further It is a case of use whatever octane rating your machine was designed for.High compression or low compression systems will dictate what fuel you use.Thankyou grumpy for clarifying something I thought I knew:)
As for the Ethanol yes I guess for this one its a case of I had no choice but to investigate and educate myself in order to fix the problems the Ethanol caused in these cars.
The question still has not been answered though...Why did the Stihl tech tell ABC to use 95 octane?Is this the fuel recommended by Stihl for its engines?And what is the basis for the other two members use of High octane fuel???