Guys. This is a thread about oil. If you wish to discuss politics there is a section for it.
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Why do "Chinesium" chainsaws need a richer oil mix?
- Thread starter Chucksta
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If you would like to discuss politics please do so in the appropriate section.
If you want to launch personal attacks however there is no section for that.
Please keep the discussion at least mildly on topic. I think you all for your understanding.
If you would like to discuss politics please do so in the appropriate section.
If you want to launch personal attacks however there is no section for that.
Please keep the discussion at least mildly on topic. I think you all for your understanding.
It's because high quality, high performance machines need a lot of oil. OEM only needs half that much.
LOL.
echomeister
ArboristSite Operative
I bet if the big 3 were free from environmental pressures they might say the same thing about break in oil mixing
It's big 2, and they might.
I know Husqvarna manuals for Sweden and most countries besides USA and Canada recommend 33:1 in any saw over 80cc.
I'm going to run 40:1 in my China 372 and plan on 32:1 when I use it with a mill to cut fir, spruce and cedar.
From the bunch of videos online I've watched about these saws that seems to be the rough consensus. Ive seen here and elsewhere talk of 25:1 for a mill but I think that's for bigger saws with longer bars and hardwood.
Someone correct me if I'm wrong. As for oil type or brand I've never noticed a difference. If I had a high dollar saw used several hours a day I'd probably go with better oil. More important I think is the gas. I do use a little Marvel in it whether that does any good idk
I'm taking it home this summer and using the 372 clone with a 24in bar to mill some 6x6 and 8x8's so we will see how it goes
GeneralKayoss
ArboristSite Operative
That's how I run mine 30:1 for milling, 40:1 for general use.
The general consensus on oil seems to be "as long as it's name brand, send it." Not brave enough to try chinese 2 stroke oil yet
. I prefer 93 octane non ethanol, but I'll run 90 in a pinch.Adding more oil during break in is counter productive on a premix system. Oil injection is a different matter.
Just ( . ) ( . ) s.. LOL.. So.. Here we are .. back at again. But at least the thread has morphed back to some semblance of my original question..
So, to "poke the bear" a little bit more. Let's get into a bit of a different detail.. Shall we?
IIRC, "back in the day", and truly, I don't know if this is still a "thing", you broke an engine in on Dino oil, before switching to Synthetic. The theory being that Dino oil allowed the rings to seat properly, and if Synthetic oil was used off the get go, there was a risk that the rings would never properly seat, as there was a limited time frame for that to happen. The cross hatching in the bore would be gone before the rings had mated to the bore.
So.. once again .. "back in the day", I bought a brand new '02 Subaru WRX. It was stated in the manual to use Dino oil until the rings seated, before switching to Synthetic. Also, not to exceed 4,000 R.P.M. for the first 1,600 Km. ( 1,000 miles). ( Darn.. that was hard!), and not to travel at a constant velocity, and to vary throttle and speed settings. At about 20,000 KM, ( 12,000 Miles), the mileage and performance suddenly took a big improvement. Time for full synthetic!!
At 300,000 Km, ( 180,000 miles), it still hauled butt like a scalded cat and, didn't ever burn a drop of oil. Did the break in matter? No way to know. Did it ever start to burn oil? I don't know. 'cause I sold it.
Maybe any saw, Chinesium or not, should be broken in with a rich mixture of dino oil before being introduced to a "skinnier" mixture of premium synthetic?
Then again, realistically, who would go through 5 tanks of fuel (25 to 1 dino mix), without breaking 8,000 R.P.M., and 2/3rd throttle?
What does YOUR Stihl, Husky , Echo, etc., manual say about it? Or, do they just say to use a particular oil, ( which , arguably, today, is a premium synthetic)?
Have the manual's instructions on break in changed in the last 20 years? If so , that would indicate a change in metallurgy, and tolerances, and possibly advancement in ( dino vs synthetic ) lubrication.
There is also another school of thought, although it's in a minority, that when breaking in with synthetic oil, that beating the living snot out of it is your best bet.. Yeah, yeah.. I know what you're thinking, but hear me out.. It's the combustion pressures that slam the rings against the walls of the cylinder, and force them into the cross hatching to seat them. The harder you run it, the harder you push the compression rings into the walls.
But, seriously, with a chain saw, you usually start off with a 50 to 1 (ish) ratio, right out of the Dealership.. And the chances of you not pegging it in the first tank, is pretty much zero. It's usually a case of " Let' see how this dog eats!!"
It'd actually be cool to have someone who runs saws all day, every day, buy two identical saws.. Break one in with 25 to 1 dino oil, low R.P.M.. low throttle., 10 tanks of fuel, and then switch to 50 to 1 Premium synthetic, and run the other one out of the box at 50 to 1, premium synthetic, and beat it like a red headed step child.. And for the Amsoil haters, a third one, with Amsoil Saber, at 70 to 100 to 1, and beat the living snot out of it right off the get go. Clock the hours or total tanks of fuel, and see what coughs up it's cookies first. But, it'd have to be someone who runs all day .. every day.. Ya wouldn't want to wait decades for the results..
Well.. that third one is because I've been running Amsoil Saber at 70 to 1 in all my stuff.. never an issue.. But then again, some of you guys put more hours on a saw in a month, than I used to in a year. I love being retired!!.
Gentlemen!! Your thoughts, and observations..
And please.. no )_(&^ing contests..
So, to "poke the bear" a little bit more. Let's get into a bit of a different detail.. Shall we?
IIRC, "back in the day", and truly, I don't know if this is still a "thing", you broke an engine in on Dino oil, before switching to Synthetic. The theory being that Dino oil allowed the rings to seat properly, and if Synthetic oil was used off the get go, there was a risk that the rings would never properly seat, as there was a limited time frame for that to happen. The cross hatching in the bore would be gone before the rings had mated to the bore.
So.. once again .. "back in the day", I bought a brand new '02 Subaru WRX. It was stated in the manual to use Dino oil until the rings seated, before switching to Synthetic. Also, not to exceed 4,000 R.P.M. for the first 1,600 Km. ( 1,000 miles). ( Darn.. that was hard!), and not to travel at a constant velocity, and to vary throttle and speed settings. At about 20,000 KM, ( 12,000 Miles), the mileage and performance suddenly took a big improvement. Time for full synthetic!!
At 300,000 Km, ( 180,000 miles), it still hauled butt like a scalded cat and, didn't ever burn a drop of oil. Did the break in matter? No way to know. Did it ever start to burn oil? I don't know. 'cause I sold it.
Maybe any saw, Chinesium or not, should be broken in with a rich mixture of dino oil before being introduced to a "skinnier" mixture of premium synthetic?
Then again, realistically, who would go through 5 tanks of fuel (25 to 1 dino mix), without breaking 8,000 R.P.M., and 2/3rd throttle?
What does YOUR Stihl, Husky , Echo, etc., manual say about it? Or, do they just say to use a particular oil, ( which , arguably, today, is a premium synthetic)?
Have the manual's instructions on break in changed in the last 20 years? If so , that would indicate a change in metallurgy, and tolerances, and possibly advancement in ( dino vs synthetic ) lubrication.
There is also another school of thought, although it's in a minority, that when breaking in with synthetic oil, that beating the living snot out of it is your best bet.. Yeah, yeah.. I know what you're thinking, but hear me out.. It's the combustion pressures that slam the rings against the walls of the cylinder, and force them into the cross hatching to seat them. The harder you run it, the harder you push the compression rings into the walls.
But, seriously, with a chain saw, you usually start off with a 50 to 1 (ish) ratio, right out of the Dealership.. And the chances of you not pegging it in the first tank, is pretty much zero. It's usually a case of " Let' see how this dog eats!!"
It'd actually be cool to have someone who runs saws all day, every day, buy two identical saws.. Break one in with 25 to 1 dino oil, low R.P.M.. low throttle., 10 tanks of fuel, and then switch to 50 to 1 Premium synthetic, and run the other one out of the box at 50 to 1, premium synthetic, and beat it like a red headed step child.. And for the Amsoil haters, a third one, with Amsoil Saber, at 70 to 100 to 1, and beat the living snot out of it right off the get go. Clock the hours or total tanks of fuel, and see what coughs up it's cookies first. But, it'd have to be someone who runs all day .. every day.. Ya wouldn't want to wait decades for the results..
Well.. that third one is because I've been running Amsoil Saber at 70 to 1 in all my stuff.. never an issue.. But then again, some of you guys put more hours on a saw in a month, than I used to in a year. I love being retired!!.
Gentlemen!! Your thoughts, and observations..
And please.. no )_(&^ing contests..
Yup... That's pretty much what I meant.. Just looking for the different opinions on pegging it with a rich dino oil mixture, not pegging it, whatever..
I can't remember ever seeing a comparison between the various options for a break in.. That means a comparison that has some standards and reputable results,, I'm sure " project farm" could do a good job of it, but on this site, his opinions aren't highly respected..
Thr only break in that happens in a two cycle is for the rings to seat. This only happens with ample load. Run them like you stole them from day one is what I do and have done for many years.
echomeister
ArboristSite Operative
How do you know if the rings have seated. My G5800 smoked a bit for the first few minutes of running. I didn't run it hard just trimmed a few limbs. After that the smoking stopped.
Two stroke will smoke a bit until they come upntonfull temp. Especially if your tuned rich.
I woukd love to see PF do such a comparison...NOT!Yup... That's pretty much what I meant.. Just looking for the different opinions on pegging it with a rich dino oil mixture, not pegging it, whatever..
I can't remember ever seeing a comparison between the various options for a break in.. That means a comparison that has some standards and reputable results,, I'm sure " project farm" could do a good job of it, but on this site, his opinions aren't highly respected..
This Chinesium one says 25:1 right on it. It came with a manual but of course I didn't read it. I run it 32:1 dominator just like I do anything else. I run a new saw just like and old saw. I have never done any type of break in except for maybe some heat cycles on a few of them. I got this little joncutter last year for $80 delivered. Bought a new oregon bar and chain on clearance at Walmart for $20. Used it several times, so far so good. 
You know the rings have seated, when the saw "wakes up" .. somewhere between the 5th and 10th tank of fuel. There's no other variable that would account for the increased performance. I'd attribute the initial smoking to the assembly lubricant being dissolved in the crankcase, by the fresh fuel mix, and getting burned in the combustion process. Kinda like when you fog 'em for the Winter, and then they blow blue on the first Spring start. As 2 strokes only have 2 compression rings, and not a third oil control ring, like a car or 4 stroke, to me .. that makes sense. I've "over fogged" a few.. and they can partially foul the plug on the next start up.
When I store my sleds, I fog them out, and then, in the fall, I fire them up with the fogging oil, and then swap in a new set of plugs for the season.
Actually up untill a few years ago the usa manuals said the same thing for "severe use situations."
One of the more fun things I got to do while being a diesel mechanic was running in engines on the dyno and performance testing. Rings need dynamic load to seat properly and quickly. It's very easy to see on the dyno, power output increases, hp and torque curves jump up, it's a fairly quick thing to happen on the dyno. Saw just cutting wood don't see nearly the consistent load you get on a dyno, so it takes longer.
The synthetic vs Dino oil has been bs for the past 20 years or so. Dino oil is so refined these days some of it is even classed as a synthetic. Won't effect break in period much if at all. It's all about the load on the rings in a 2 stroke, there's nothing else to wear in.
