What oil is best? and what ratio?

[mdavlee]

- when I had the thermocouple probe threaded into the decomp port scott and I were getting ignition temps of ~1850 F degrees.

- With the thermocouple (ring mounted under/spark plug tightened down on top of) the highest I've had the 661 was ~540F

- I can get the saw to ~475-500F pretty quick 30-40sec cut with long bar and full comp chain, in the summer and I am running 32:1.


- Aluminum melts somewhere around 1100F


Factor in any or a few of these below = doesn't seem like a stretch to say you will quickly be walking the razors edge.
- old gas, dull chain, workin the saw, 50:1 (I say 50:1 because all the saws I've seen roasted have been 50:1), poor bar oil, worn/bad clutch, bad tune, hot sunny day, list goes on and on...


But! for another measly .20cents per gallon one could run 40:1 - add a little insurance. Bearings is what needs the most oil anyway.

Egt’s are gunna tell you more than anything. Aluminum melts at around 1250 from what I’ve heard. I’ve seen 2 strokes live at 1325 egt but that’s walkin a thin line

In a cylinder they won’t melt that quick normally. Aluminum pistons in diesels will hold up to 1800 degrees for short bursts. The piston isn’t that hot just the exhaust gas. Highest I ever seen was 1999 on a digital gauge.

 

[Deets066]

Different engines entirely, I burnt the exhaust side off of 7 different pistons on my sled. They’d never make it to 1400

 

[mdavlee]

Different engines entirely, I burnt the exhaust side off of 7 different pistons on my sled. They’d never make it to 1400

With no cooling surrounding the cylinder no doubt. Wonder what the exhaust side of the piston on methanol was when I melted it?

 

[bwalker]

Different engines entirely, I burnt the exhaust side off of 7 different pistons on my sled. They’d never make it to 1400

Where you mount the probe matters too.

 

[bwalker]

So let me ask a question That I’m sure has been brought up more than a few times elsewhere how important is the flash point of an oil. I’m running Amsoil saber at 40 to 1 contemplating going to something with the higher flashpoint like Motul 800 2t. I’ve never had a problem so I should probably just leave well enough alone I just think it’s interesting


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Flash point isnt important at all unless you need the information for shipping or storage purposes.

 

[Wood Chopper]

Ok thanks. I’ll just stick to what’s working


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[danimal]

So let me ask a question That I’m sure has been brought up more than a few times elsewhere how important is the flash point of an oil. I’m running Amsoil saber at 40 to 1 contemplating going to something with the higher flashpoint like Motul 800 2t. I’ve never had a problem so I should probably just leave well enough alone I just think it’s interesting


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Stick wiff da saber @ 40-1..
I run dominator and Maxima K2,
both at 32-1. NO CARBON buildup, no smoke after warmup. Doubt bearing failure will ever be an issue.

 

[danimal]

I think the Klotz Benol would do better with high heat.

Exhaust plugging, muffler goo dripping CHIT. If yer into that sort of thang.

 

[Deets066]

Exhaust plugging, muffler goo dripping CHIT. If yer into that sort of thang.

Not with a proper tune, I haven’t had any issues

 

[jakethesnake]

Not with a proper tune, I haven’t had any issues

How small of saws you use man?

 

[Deets066]

How small of saws you use man?

Usually 200T - 2100

 

[jakethesnake]

Usually 200T - 2100

The bigger ones seem to dig it. Seems it’s working for you. I had some trouble in the cold weather with it on 50cc saws

 

[Deets066]

The bigger ones seem to dig it. Seems it’s working for you. I had some trouble in the cold weather with it on 50cc saws

I never had issues, doesn’t mean somebody else won’t.

 

[Ron660]

Motul 800 doesn’t burn very well in a saw

It does well noodling or cutting stumps in a ported 372 and 660 (inside mufflers dry). Bucking I agree that's why I switched to 710.

 

[Deets066]

It does well noodling or cutting stumps in a ported 372 and 660 (inside mufflers dry). Bucking I agree that's why I switched to 710.

It wasn’t aweful, but it never made any carbon. Thus the not burning

 

[Terry Syd]

I just saw that this thread was still running. I thought I'd get in a post before the page count hit 700.

 

[RI Chevy]

And we are still back at square one.

So what is the best oil to run in my saws?

Good to go for another 700 pages now. lol
Dong, ding.......

 

[Cat 525]

I think I will keep using the silver bottle husky oil!

 

[sawmikaze]

Is it not a good thing i run oil made for a chainsaw in my chainsaw ?

 

[RI Chevy]

Good idea Ryan! I don't care what they say bout chu.
You're OK in my book.