What oil is best? and what ratio?

[junkman]

Do you mill with 404 or mostly 3/8?

.404 only now ,with 3/8 my bar was getting too hot ,and had to sharpen the chain more often ,the wider links of the .404 carry more oil and on a 32 inch bar there is 96 vs 105 drive links creating friction so that alone helps run cooler .

 

[Keith Gandy]

Red Armor did a good job on this air leak on my 390xp

 

[FergusonTO35]

Here's something I've often wondered. Why did Poulan insist on a stone age 16:1 mix well into the 90's when darn near everybody else was at 40:1 or 50:1? Sometime around 1993-1995 they switched to 40:1 where they are today. Was there some sort of design change they finally made to their engines? Or, just a company tradition that they finally had to let go of as smog regs got tighter? I've read that some really old outboards and chainsaws had bushings instead of bearings in the crank, and so needed a really slimy mix to survive. Can't imagine that a chainsaw or weedeater made when I was in high school would actually need that much oil though.

 

[Ron660]

I used up the xp i had ,so back to saber ,when i use that up i am using this up ,i have about 8 bottles of each .Let the bashing begin,i will most likely buy more saber because the Matco guy has it on the truck ,so it is pretty much delivered to me . View attachment 78021 .

Are you mixing 32:1?

 

[Ron660]

Red Armor did a good job on this air leak on my 390xpView attachment 78329 View attachment 78330 View attachment 78331

Mixing 40:1?

 

[Keith Gandy]

Mixing 40:1?

Yes sir

 

[Ron660]

Yes sir

Feed that 390xp more oil when noodling......32:1?

 

[Keith Gandy]

Feed that 390xp more oil when noodling......32:1?

No. 40to1 with 28" 404 buried. Cylinder had no blemish even running a airleak

 

[junkman]

Are you mixing 32:1?

40 to 1 reg cutting or milling, runs a little leaner at 32 to 1 ,for some reason they seem to run cooler at 40 to 1

 

[Ron660]

No. 40to1 with 28" 404 buried. Cylinder had no blemish even running a airleak

My 660 likes 24:1 in the summer cutting stumps with the bar oiler turned up.

 

[Ron660]

40 to 1 reg cutting or milling, runs a little leaner at 32 to 1 ,for some reason they seem to run cooler at 40 to 1

What saws you mill with?

 

[mdavlee]

What saws you mill with?

660 is what he uses on his jig.

 

[junkman]

What saws you mill with?

Yes , a 660 ,Randy ported it for milling ,it milled fine stock also ,running square .404 chain also

 

[Stihl working Hard]

No. 40to1 with 28" 404 buried. Cylinder had no blemish even running a airleak

Time to buy a lottery ticket Keith I would say you were lucky to catch it in time my friend

 

[Keith Gandy]

Time to buy a lottery ticket Keith I would say you were lucky to catch it in time my friend

Clamp must have helped it but I could tell it wanted to idle high so I started lookin

 

[RI Chevy]

Good instincts Keith.

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[Keith Gandy]

Now fellers yall know if I was runnin any oil other than RA she woulda cried WOLF!!!!

 

[RI Chevy]

Lol. Too funny

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[Keith Gandy]

Need them hip boots up in here!!

 

[FergusonTO35]

I often wonder, what is the real effect of oil on the air to fuel ratio? If we are talking 50:1 vs. 32:1, that is 1.2 ounces of oil difference. As there are 128 ounces in a gallon, even if more oil did lean the AFR that is less than a 1% difference. I would think that would be more than made up by the additional lubricant supply and perhaps slightly lower combustion temperatures as the oil isn't nearly as volatile as gasoline. The effect could even be similar to EGR on a modern four stroke auto engine, the oil acts as a less combustible substances added to the fuel-air charge which brings combustion temperatures down. Just something I've always thought about!