Bror, you think thats impressive. Next time I rebuild my bike I will show you what a piston looks like about 100 hours of run time on it. Very clean at 32:1.
Two Stroke Premix
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I just felt like bringing this topic back from the dead instead of starting a new thread. My brand spanking new Lawn-Boy Durafore 6.5 HP calls for a 35:1 mixing ratio. I'm placing my Amsoil order and was gong to toss a few bottles of 100:1. I'm thinking about running it at 50:1 for that nice saftey margin. Does that sound safe and good?
scott, if i were you, and don't get me wrong, amsoil is wonderful stuff, if lawnboy says to use a 35:1 ratio, thats what i would use. their ashless oil in the green cans is made just for it. why take a risk and run it too lean? if you really want to use something different, just use one of the universal 40:1 mixes. they should still be safe. still, i would use the lawn boy stuff. just my opinion. cut 13 yards a week. been doing it for 10 years. penz
for all interested, at work, we use stihl chainsaws quite a bit, we have just received a new shippment of stihl 2 cycle mix. we used to get the orange 50:1 bottles. we are now, and i don't know if it's because we are 4 miles from a stihl plant, getting white bottles that are marked universal 40:1. i don't know if there was a problem of burning up engines or not. i reckon it will be all over the place soon. penz
Penzdude, all our older Stihls use 40:1. An O45 saw amd a Fs-61 string trimmer.
I wonder if older Stihl owners accidently took the little bottles (50:1), mixed them with 1 gallon of gas and then proceeded to burn up their motors?
--- Bror Jace
I wonder if older Stihl owners accidently took the little bottles (50:1), mixed them with 1 gallon of gas and then proceeded to burn up their motors?
--- Bror Jace
FWW Stihl has 3 different 2 stroke oils they are selling now. The Universal is the cheapest of the 3. I have not tried their latest low smoke oil a ISO LEG D and JASO FC. I just use the orange bottle, it is a 50:1 nowdays I mix it at 40:1 2.6 to .8 of a gallon. used for many years. It does build up some on the exhaust port after many hours but no other problems on weed trimmers and chainsaws. Echo has a newer oil called Power Blend that also is also a low smoke 50:1 ISO LEG D and JASO FC. I'am thinking of going to this because it has a fuel stabilizer in it. But mix it a 40:1
MolaKule
Staff member
Bror,
Yes. Stihl and Echo and others are going to the PIB and to PIB/ester mixes to reduce smoke.
Next to the ester formulations, PIB is a most clean burning, high lubricity, low smoke oil 2C base oil available.
Yes. Stihl and Echo and others are going to the PIB and to PIB/ester mixes to reduce smoke.
Next to the ester formulations, PIB is a most clean burning, high lubricity, low smoke oil 2C base oil available.
Just bought me a Stihl stringweedwhacker...nice unit.
The shop (Carl's in Ferndale) did an A+ job c.s. with me....extra string, safety glasses, oil....and well the guy says (NOT knowing I'm an Amsoil peddler):
"....Don't care WHAT brand oil you use, but don't use any of that cheap Pennzoil like stuff, etc....Stihl likes you to use their stuff, but you don't have to.....use an oil that at least is for chainsaws.." (Of note was not one mention on "governing bodies")
Then he says as far as ratios:
"always follow what the oil says, not just 50:1, as the Stihl oil is mixed at"
We walked through the care and feeding, went outside and fired it up etc...
I came home and ran the small amount of fuel in the tank and slow medium RPM's.
Then I mixed up some Amsoil "100:1" Premix at about 60:1......to soon to tell...but still runs well
The shop (Carl's in Ferndale) did an A+ job c.s. with me....extra string, safety glasses, oil....and well the guy says (NOT knowing I'm an Amsoil peddler):
"....Don't care WHAT brand oil you use, but don't use any of that cheap Pennzoil like stuff, etc....Stihl likes you to use their stuff, but you don't have to.....use an oil that at least is for chainsaws.." (Of note was not one mention on "governing bodies")
Then he says as far as ratios:
"always follow what the oil says, not just 50:1, as the Stihl oil is mixed at"
We walked through the care and feeding, went outside and fired it up etc...
I came home and ran the small amount of fuel in the tank and slow medium RPM's.
Then I mixed up some Amsoil "100:1" Premix at about 60:1......to soon to tell...but still runs well
Hi Pablo
I was under the impression that Amsoils 100:1 wasnt supposed to be mixed richer than 80:1.
Was I mislead?
I was under the impression that Amsoils 100:1 wasnt supposed to be mixed richer than 80:1.
Was I mislead?
Skinnyd,
[ May 29, 2003, 03:30 PM: Message edited by: Pablo ]
[ May 29, 2003, 03:30 PM: Message edited by: Pablo ]
The landscapers find that mixing the AMSOIL 100:1 works better than using a richer mixture. Runs cooler than with 60:1, and less chance of fouling.
Interesting concept - the engine will actually run cooler with less oil in the mix? Need to study that one - can you elaborate on that?
I will probably go to 100:1 when I go through this gallon, but with a new engine I didn't want to go too lean on oil.
I doubt fouling will be a problem anywhere between 50-100:1...and if it does, cool excuse to get an NGK plug!!!
I will probably go to 100:1 when I go through this gallon, but with a new engine I didn't want to go too lean on oil.
I doubt fouling will be a problem anywhere between 50-100:1...and if it does, cool excuse to get an NGK plug!!!
Pablo,
I have a Stihl FS72 trimmer and Farm Boss chain saw. I run them both at 100:1 and they run perfectly at this mix ratio. I have experimented with 66:1 and it was much too rich. The 100:1 stuff has little or no solvent so it's very concentrated.
TooSlick
I have a Stihl FS72 trimmer and Farm Boss chain saw. I run them both at 100:1 and they run perfectly at this mix ratio. I have experimented with 66:1 and it was much too rich. The 100:1 stuff has little or no solvent so it's very concentrated.
TooSlick
My main reasoning is: rich for the break in period....
I can see why a too rich situation MAY run hotter: Oil effectively lowers the anti-knock index and the richer mix will have more of a propensity to ping, causing a hotter, less efficient combustion process.
PS I put some PI in, as well.
I can see why a too rich situation MAY run hotter: Oil effectively lowers the anti-knock index and the richer mix will have more of a propensity to ping, causing a hotter, less efficient combustion process.
PS I put some PI in, as well.
PI is good--
Keep in mind that the 100:1 has been tested at 300:1.
Keep in mind that the 100:1 has been tested at 300:1.
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