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To be honest,
I just take my gas jug along with me when I fuel up my car,
and just use regular.....
I just take my gas jug along with me when I fuel up my car,
and just use regular.....
Whatever works for you, man. Personally, I think ultra sucks as oil, and it smells unbelievably awful in the exhaust, so I'd never run it. Have I run ethanol gas more than a month old? Yes, but would I recommend it to someone? No.
How do you know its 100% gas .Hey guys
I always use 100% gasoline in my equipment and 93 octane.
The only station in my town that had 100% 93 octane fuel no longer sales it.
The only thing I can find in 100% octane is 87. What are the chances I have a problem running 87 100% gasoline.
I use the Stihl UltraHP Synthetic oil.
I guess I should go ahead and say I already bought the 87 fuel and mixed it.
I never knew Stihl required 89 until now. As I always used 93.
My saw is Stock. There are no modifications of any kind done to it.
Thanks for your advice.
Idiots? WHO THE F ARE YOU TO JUDGE?You're all wacky on this thread, give up idiots.........
Wait a minute! Consulting the manual is no fun! Whoever heard of doing such a thing? Arguing about opinions and old wives tales is much more fun.Just a example snapshot from a Stihl manual below. I take it as a recommendation from Stihl engineers to help in worry free service of their product. Your adjustment will vary from there. Nice thing about computer controlled saws, will adjust for you for various fuel grades and other variables. Sometimes you just need to burn what you have.
- Says 89 Octane is recommended as a minimum and can use ethanol up to 10%. By the way MotoMix is 93 octane.
- Watch seasonal grades sold and adjust carb for fuel used. If keep changing fuel grades your saw will run different requiring adjustments. Keep consistent.
- Ethanol long term storage in carb try to avoid especially in humid climates that attracts moisture.
- Your elevation, temperature, humidity and chainsaw compression you might run 87 octane and get away ok, but like said above a mere per gallon difference to get 89 is small price to pay.
- View attachment 869583View attachment 869584
I didn't need to read the whole thread but the number on the pump that says the octane number. 87 is 87 octane 89 is 89 octane and 93 is 93 octane. Weather it has ethanol in it or not. Octane numbers has to do with the flash point at witch it will combust under pressure. The higher the number the more pressure it takes to ignite under pressure. 87 octane is actually more dangerous then 100 because it takes less pressure for it to combust.
Never!You're all wacky on this thread, give up idiots.........
Just a example snapshot from a Stihl manual below. I take it as a recommendation from Stihl engineers to help in worry free service of their product. Your adjustment will vary from there. Nice thing about computer controlled saws, will adjust for you for various fuel grades and other variables. Sometimes you just need to burn what you have.
- Says 89 Octane is recommended as a minimum and can use ethanol up to 10%. By the way MotoMix is 93 octane.
- Watch seasonal grades sold and adjust carb for fuel used. If keep changing fuel grades your saw will run different requiring adjustments. Keep consistent.
- Ethanol long term storage in carb try to avoid especially in humid climates that attracts moisture.
- Your elevation, temperature, humidity and chainsaw compression you might run 87 octane and get away ok, but like said above a mere per gallon difference to get 89 is small price to pay.
- View attachment 869583View attachment 869584
RON (Research Octane Number) is normally higher than MON (Motor Octane Number). MON is time consuming and needed standard test engines. MON would be suit your purpose - to determine effect of different ON (engine knocking characteristic) rating.This is somewhat useful information regarding octane and road vehicles, but is only part of the story when fueling a 2 cycle off road engines.
When it comes to chainsaws and other 2 cycle engines without oil injection, the fuel equation gets several additional factors beyond octane.
Two octane numbers are routinely used to simulate engine performance: the RON
Ron is (Research Octane Number) MON is the (Motor Octane Number) A pump will show the MON witch is the lower number.They are two different blends for different purposes and neither number simulates anything. They are scientifically defined.
It seems so, and I am definitely the idiot for allowing myself to keep being drawn in and providing information with backup.An octane thread is much more dangerous than an oil thread!!
You don’t want to be anywhere near Gatlinburg this time of year.TnShooter, I guess since Stihl and Husqvarna make 3 grades of saws Homeowners,Farm and Ranch and the Pro saws it might be best to match them up with the 3 octane grades of gas. I thought I did read somewhere that Stihl recommended a min. of 89 octane. In Germany Stihl and Dolmar were designed to run on 100% gas without ethanol. Man I really would hate to drop $1300 or $1400 on a new MS 500i and end of smoking that baby. Shooter after all this conflict I need a week in Gatlinburg.
See post #6How do you know its 100% gas .
And yep I did not read all the thread .
I don’t think I’ll be the one to start that....lolAn octane thread is much more dangerous than an oil thread!!
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