Guru and the Wingman- Need insight

[Cut4fun]

 

 Saw ran good until "Opti" was used to fuel saw.  Not sure if 1 gallon pouch (70:1) or 2.5 gallon pouch (100:1).  

 New owner had a previous saw that was also melted down.
 
 Larry (GURU), HOS.

Now the truth comes out.......the buyer used Optimol pre-mix !!

Willard.

It was actually coincidence how it happened Willard. Guy I know Wingman shows up to buy some of my 084 parts. We get talking about a 066 he sold and came back burned up.  The truth was told on OP running 70:1+ and I told him about this thread. 

So glad OP didnt take me up on my 084 for milling, I would have been one ticked off  smiley_hillbilly_tub_base  if he brought it back saying it was the saw  >:(.

[ErikC]

 I have used that opti mix from time to time, on several size stihls (290, 036, 039, 044, 460). No problems with it here. This thread is cause for concern though. But could it be more than just that he was using Opti??

[HolmenTree]

I have used that opti mix from time to time, on several size stihls (290, 036, 039, 044, 460). No problems with it here. This thread is cause for concern though. But could it be more than just that he was using Opti??

It's obvious the 066 was tuned for 50:1 regular 2 cycle oil ,then milling was commenced with no readjustment with 70- 100:1  optimol mix gas [different breed of 2 cycle oil altogether]. Now we're on a different side of " lean" condition.

Willard.

[John Mc]

I have used that opti mix from time to time, on several size stihls (290, 036, 039, 044, 460). No problems with it here. This thread is cause for concern though. But could it be more than just that he was using Opti??

I have no idea if the oil itself in those little pouches is any good. One problem is that they give you 1.8 oz of it and say to mix it with one gallon of gas. This gives you a 70:1 ratio. If instead, you mix it with about 0.7 gallons you'll get a 50:1 ratio, which is probably a safer place to run your saw.

John Mc

[HolmenTree]

Another problem with these Opti pouches is shelf life. The thin plastic  leaches out useful solvents in short time producing a unsafe friction barrier in the operation of the saw. I know a few dealers with inventory up to or over 10 yrs old.

Willard.

[Rocky_J]

My experience with Optimol oil is from 20-25 years ago when it first came out. Right from the get go my dealer was mentioning engine seizures from customers mixing it too lean. When Echo adopted it and put it in their own packaging I bought it under the Echo label, but the numbers on the bottle added up to 50-1. The numbers on the Opti packaging never added up and it was more expensive for less oil.

Anyway, I ran it for over a decade buying in larger bottles and always making sure I used slightly more oil and slightly less gas than specified. I just wanted a tiny fraction more margin for errors or variances in packaging volume. I never had a problem with it in all the years I ran it. But the plastic pouches for 1 gallon mix measurements were asking for trouble because they cut the volume of oil too far. If you got every drop out then it was good for 0.9 gallons but most people aren't that careful and don't worry about the 8-10 drops dribbling down the outside of the gas can. Then they put 1.2 gallons of gas in the can because that's what it will hold.

[Al_Smith]

  Hey Guys,

  
 
  Larry (GURU), HOS.

Hi Larry ,good to see you up and kicking . ;D

Oh I just don't know about this "miracle "  type oil some think they have to have .Amsoil or this stuff in question .I mean for heavens sakes those old saws ran for decades on 16 to 1 with 30 WT motor oil . Same with the old outboards and many are still in use today .

Now being an old timer I use 32 to 1 but 40 or even 50 is alright in my book .70 to 100 to 1 is kind of pushing  it though .

[John Mc]

Oh I just don't know about this "miracle "  type oil some think they have to have .Amsoil or this stuff in question .I mean for heavens sakes those old saws ran for decades on 16 to 1 with 30 WT motor oil . Same with the old outboards and many are still in use today .

Now being an old timer I use 32 to 1 but 40 or even 50 is alright in my book .70 to 100 to 1 is kind of pushing  it though .

I don't think anyone is arguing that Optimol is some sort of "super oil". My concern was just the opposite.

I'm guessing those older saws had to run 16:1 or 32:1 because they were running something like 30wt motor oil. If I were running that oil, I sure wouldn't be pushing it to 50:1. It doesn't bother me to run 50:1 in an older saw (or my weed whacker, which calls for 32:1) as long as I'm using a good oil in it.

[Al_Smith]

 Oh sure when all they had was 30 or 40WT Sae oil they had to run at 16 to one .However even back in the 60's they had better mix oil they ran at 40 to one with no problems. Early  to mid 70's they had 50 to one .

Some of us run 32 to one because we prefer it not because we have to . Just preference and I have no intention of reviving the great "oil wars " which seem to go on forever . :D

[Kevin]

For each 'intake' stoke there is a certain volume of liquid which comes out of the carb. If at 50:1 the amount of gas is correct, at 32:1 you have more oil therefore you have less gas because the volume coming out of the carb remains the same. So you are now running the saw leaner.

That doesn't make sense to me.
Less gas and more oil =less lean.

[Al_Smith]

 :D I could never figure that out either but some people swear by it .

So evidently with that thinking you should at least in theory burn more saws up by running 32 to 1 as opposed to super duper oil at 100 to 1 . Oh well I've been wrong before .

[tyb525]

In order to run the same speed and get the same power at 32:1, you would have the same amount of gas burned, with more oil than a 50:1.

[Al_Smith]

Perhaps so on a strictly stock saw .However with some enhancements that amount of gasoline has been increased ,still got the oil though .It takes fuel to make power . 8)

[tyb525]

Al I was trying to say I agreed with you :D How can a 32:1 ratio seize a saw, but not a 100:1!

[Al_Smith]

 I could never figure it out either but some people will argue to the ends of the earth over it .Dumb as it may sound one praticular genious on one of the forums even suggested that old cast iron lined Macs would run on staight gas.

Well he was partially correct because they will ,and run fast  but not for too long .Kind of like an electric motor when they burn up .Once all the smoke leaks out they never run again .

[SwampDonkey]

 :D :D :D :D

I don't want to bash a dead horse, but I have run 80:1 on AMzoil mix in a Stihl brushsaw and those saws are turning 12500 rpm at peak, but I generally just touch the throttle. I don't run a saw screaming mad. I don't need to. I get 1.5 hours on a tank and forever looking for the gas jug to refill because I'll sometimes be 50 meters from the jug or more. This spring I was on a light work strip or three and 4 tanks of gas cut 2.5 acres. But, I never saw the benefit in using Amzoil because of the price, so I just use Stihl or Husky oils. I had people tell me you can't smell the exhaust off Amzoil mix, nothing but bunk.