LOL.
Now I am sitting on 2 pints of Stihl oil doubting my purchase. Maybe I will burn it in my outboard.
In seriousness I will burn it but I am surprised to hear it has problems richer than 40:1. But these guys spend way more time researching than I do so I'll take their word.
I've got no issues with any Randy east of the Mississippi.
No biggie SVK.
Lets be real guys.
There are very few in this thread that use a saw enough to be very concerned about any of this.
The build-up only comes after much use, not a few tanks a month, but a few tanks a day.
I believe the same with any issues on saws running 50:1.
We run a greater risk of accidentally straight gassing a saw before we will ever see a problem from running 40:1 stihl ultra or running 50:1
.
Lets not get to excited, many guys have run 50:1 for many yrs 5 days a week and no problems. I'm sure the same can be said for the stihl ultra at 40:1, but I don't know of those.
I usually do a gallon or .8 gallon at once then mix up a new batch and throw the rest in if it is getting down there or has sat for a bit. If it has sat more than a season it goes in the truck.
This should be more of a concern than what I was talking about above.
The amount of time a fuel sits is of great concern if running ethanol.
As the ethanol separates the mix does not adhere to the ethanol molecules (this is my understanding anyway) then you are running straight ethanol, not good.
I only mix 2 gallons at a time and use it in less than a month. If this was not the case I would mix a gallon at a time.
If that didn't get used in a month I would buy ethanol free fuel and mix a gallon and make sure it was used within 3 months.
If that wasn't being used I would just by the pre-mixed cans.
Hope this helps someone.
ETHANOL WILL GIVE YOU PROBLEMS IN SMALL ENGINES NOT RUN ON A NORMAL BASIS.
THIS IS NOT MY OPINION, BUT FACT, YES I'M YELLING LOL.
I have no issues with him either.
I don't know how much research he has done, but plenty of experience, I trust experience.
There have been other things said in private conversations with me personally and others with similar experience that lead me to believe that 50:1 is fine, but they run 40:1 because they always have.