Well, at a $20/ gal premium over reg fuel I wonder how long it will take to pay for preventing a ruined engine from, say 2x or 3x the OEM's gas
il ratio in the gas at all??! (Because THAT is what it will take to hash an engine, not using Stihl Ultra or other non-"acceptable" oil being mentioned.)
SO, let's calculate!
-- say a new Stihl saw costs $1000 and you put 10 gal/yr through it AND you use this woooonnndderful mixed gas: 10 gal/yr x $20 extra each gallon = $200 out of your pocket ea yr more.
-- So, you can look at it this way: you pay $200/yr to put off buying a new saw in 5 yrs
On the other hand, I would guess nearly 100% of saw owners using the,
now infamous, Stihl Ultra at a 50:1 ratio find their saws last at least 10 years. (My 362 has -- pristine cylinder face and light tan plug; my 025C is still running at 25+ yrs old.)
I can now rationalize I have saved $2000 on the 362 over 10 years and
much more with the 025C.