What happens to premix oil in the saw?

[Egg Shooter]

I’d rather have the slobber. I know that opinion isn’t popular, but that’s the sign of excess oil being blown out the muffler

I agree. I like to see a little. My leaf blower never has any but it's ran at wot tank after tank and has a cat. The weed trimmer has nearly nothing as it spends most its time wot except when moving to the next area.
Now, some of the trimmers I got my hands on looked like road tar all over the muffler and surrounding area. That's to much for me.

 

[davidwyby]

I like to know there’s plenty of erl in there. But also like my idea of burning it for mo powa.

 

[Nutball]

Way I see it, in my equipment, is if there is some oily residue coming out the muffler you aren't burning it all no matter the oil type. I run full synthetic. In some equipment there is zero coming out the muffler and they are dry inside the muff as well. Others, like my 2511T, that is on and off the throttle all the time gets a little out the muffler. So you can have full burning of the oil or not. Depends on the machine, how its used, the tune, how much it idles.

I agree if you see oil, it obviously isn't all burned, but to show that even the oil you don't see may not be burned either: consider humidity and dew point and all that, but in terms of oil. Perhaps a low enough oil content in the exhaust at high enough temps will allow the vapor to go unseen like how a hot enough burn pile doesn't show the steam cloud like a cooler burn pile. Lots of oil or lower exhaust temps could raise the dew point so you see a cloud of smoke or it at least can condense on the muffler without evaporating again.

 

[Duce]

Thread is as interesting as my saws leaking bar oil. Like seeing oil film on piston when muffler is pulled.

 

[Big_6]

Cleans and protects! Says it on the can! 93 Octane for mo powah!
At Home Depot
Lowe's has 40:1 premix, so I hear...

Sent from my SM-N975U using Tapatalk

 

[Wonkydonkey]

This is an interesting read, I know it’s a bit snowmobile related, but it does say some interesting points which we are looking at.

http://www.3cyl.com/mraxl/oil-2T/2-cycle_lubes.pdf

 

[cus_deluxe]

interesting viewpoints in there. he basically said everything except that dino oil is better than synthetic. according to him, the primary advantages of dino oil are that it provides better rust protection in the off season and are affordable. both of which occur while NOT actually using the oil lol. im sure there are applications where every oil has its niche, but if ive read one of those internet documents like that ive read a thousand. lots of opinion dressed up as fact. my oldest backpack blower has been runnin 42:1 amsoil for HUNDREDS of hours, and im quite sure it has more compression than my newer one, which probably still hasnt broken in yet, so im pretty sure, at least in my case, cylinder glazing isnt the catastrophic destruction of ring seal that this guy mentioned as the primary downside to synthetics

 

[cus_deluxe]

not trying to be oil fan boy, as has been said 1000 times before, use what works for you.

 

[Egg Shooter]

interesting viewpoints in there. he basically said everything except that dino oil is better than synthetic. according to him, the primary advantages of dino oil are that it provides better rust protection in the off season and are affordable. both of which occur while NOT actually using the oil lol. im sure there are applications where every oil has its niche, but if ive read one of those internet documents like that ive read a thousand. lots of opinion dressed up as fact. my oldest backpack blower has been runnin 42:1 amsoil for HUNDREDS of hours, and im quite sure it has more compression than my newer one, which probably still hasnt broken in yet, so im pretty sure, at least in my case, cylinder glazing isnt the catastrophic destruction of ring seal that this guy mentioned as the primary downside to synthetics

Guess I ruined this then. Saber and Dominator after a few short heat cycles with blue marble at idle.


In all seriousness, out the 22 oils I tested one did glaze the daylight out of the cylinder and it also stuck a ring like no other. It was full synthetic.

 

[cus_deluxe]

Guess I ruined this then. Saber and Dominator after a few short heat cycles with blue marble at idle.
View attachment 293973

In all seriousness, out the 22 oils I tested one did glaze the daylight out of the cylinder and it also stuck a ring like no other. It was full synthetic.

not saying its not a thing in some scenarios or whatever. just that its not a foregone conclusion like that document implied.

 

[Egg Shooter]

not saying its not a thing in some scenarios or whatever. just that its not a foregone conclusion like that document implied.

I agree 100%. It was the exception not the rule in the testing I did. The engine ran on the oil that did glaze everything looked like it had been ran on castor oil.

 

[Egg Shooter]

This is starting to feel like an oil thread.

 

[cus_deluxe]

mission accomplished

 

[cus_deluxe]

obviously bored lol and a little curious, i pulled the muffler off the old one just now. ive obviously not kept exact track of # of tanks, but its 7 years old, for a while it was my only one. its had probably 12 gallons of fuel thru it in the last month, and im not done yet. same in the fall, and regular use through summer. a bit of carbon but still looks pretty good overall for the hours on it

 

[Egg Shooter]

obviously bored lol and a little curious, i pulled the muffler off the old one just now. ive obviously not kept exact track of # of tanks, but its 7 years old, for a while it was my only one. its had probably 12 gallons of fuel thru it in the last month, and im not done yet. same in the fall, and regular use through summer. a bit of carbon but still looks pretty good overall for the hours on it
View attachment 293980 View attachment 293981

But, but, but.....its AMSOIL! How can this be?!?!? Lol.

 

[cus_deluxe]

i guess to tie it back to the original purpose of the thread, i dont know what happens exactly to the oil, but it appears in this case most of it got burned clean and went out the exhaust with a small portion remaining unburned on the internals, and a teeny tiny bit got left behind as carbon deposit.

 

[cus_deluxe]

chainsaws are stupid, i should join a backpack blower forum.

 

[Egg Shooter]

chainsaws are stupid, i should join a backpack blower forum.

Or get into 1/5 scale gas RC....

 

[cus_deluxe]

Or get into 1/5 scale gas RC....

that would be a blast. i used to race r/c cars for a few years when i was a kid, stuffs come a long way since then haha

 

[Egg Shooter]

that would be a blast. i used to race r/c cars for a few years when i was a kid, stuffs come a long way since then haha

Here's what I'm building now.