Two-cycle oil..50:1 vs. 40:1 - Homesteading Today
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  #1  
Old 11/12/06, 12:37 PM
 
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Two-cycle oil..50:1 vs. 40:1

My chain saw calls for 40:1 and I have a bunch of 50:1. Can I mix the 50:1 with 8/10ths of a gallon and be OK?

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Old 11/12/06, 12:42 PM
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Yes. that will make the oil mixture then close to, if not right on the 40:1 ratio

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Old 11/12/06, 12:43 PM
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does that make the ratio come out to 40:1 ? the way i understand it, 2 cycle oil is the same, but the mix ratio is different for the machine you may be using. i use a 2 cycle oil that can be mixed at whatever ratio one needs. i mix 40:1 for the string trimmer and 50:1 for the chainsaw.

it is touchy. if you use to little oil in a device, there is not enough lubrication. if you use too much oil, it can burn too hot and do damage.

the 50:1 mix you have already has too little oil for the chainsaw. i don't know how you plan to mix what amounts. if you add the right amount of 2 cycle oil to the 50:1, you can make it 40:1.

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  #4  
Old 11/12/06, 02:34 PM
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http://www.csgnetwork.com/oilfuelcalc.html

If you have 50:1 already mixed and you need to change it to 40:1, you need to add more OIL, not more gas. If your mix is very old Id just mix up a fresh batch.

To change 50:1 into 40:1 you have to add 0.64 OZ of oil per gallon. That going to be hard to measure accurately
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Old 11/12/06, 07:38 PM
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Better too much oil then not enough. My experience with too much is fouled plugs and exhaust ports. Too little is excessive internal engine wear, no oil is seized motors.

Pete

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Old 11/12/06, 09:16 PM
 
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If I wasn't clear....I've got the little bottles of oil.(50:1) Need 40:1. I bought 8/10ths gal of gas. I believe I got it right.

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Old 11/12/06, 09:25 PM
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[QUOTE=Jack in VA]If I wasn't clear....I've got the little bottles of oil.(50:1) Need 40:1. I bought 8/10ths gal of gas. I believe I got it right.[/QUOTE

Thats the correct amount. The link I posted lets you calcualte it in OZ's per gallon for any ratio It also works for fractions of a gallon

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Old 11/13/06, 08:28 AM
 
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Quote:
Originally Posted by RedneckPete
Better too much oil then not enough. My experience with too much is fouled plugs and exhaust ports. Too little is excessive internal engine wear, no oil is seized motors.

Pete
Exsactly !!! I always use a little more oil than called for. Yep. Every so often I have to replace, or clean a fouled spark plug, But my chainsaws and weed eaters last a long time. I use my tools hard. I cut down small tree shoots with the weed eater, and weeds that are belt high. I may run out 4 or 5 tanks of gas in a given day. Our currant weed eater is 3 years old and still going strong. I have chainsaws that are over 10 years old that still run well. They have been through a lot of chain however, and ever a few bars.
I have also seen what happens to a chainsaw when some fool used un-oiled gas. The saw ran for about 4 minutes before seizing up forever.
If ever in doubt about there being oil in the gas, don't use it. Better to throw away $5.00 of fuel that burn up a good tool.
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  #9  
Old 11/13/06, 08:56 AM
 
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Gas of unknown oil ratio mix..

"Better to throw away $5.00 of fuel that burn up a good tool."

NEVER, the ole fuel goes in my farmall along with a little gas treatment and it digests it quite readily.
"waste not, want not"..:-)

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Old 11/13/06, 09:25 AM
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I go by the manufacturers spec for mix, using their low ash oil if available. My Stihl chainsaw is expensive to replace. Oil is cheap, so are weed whackers.

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  #11  
Old 11/13/06, 04:14 PM
 
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Quote:
Originally Posted by poorboy
"Better to throw away $5.00 of fuel that burn up a good tool."

NEVER, the ole fuel goes in my farmall along with a little gas treatment and it digests it quite readily.
"waste not, want not"..:-)
Well, actually any gas I am not sure of the oil mixture, or is kind of "old", goes in my 53 Willis Jeep. I think it would run on kerosene. LOL. I don't waste much either.

jross..... Our currant "weed wacker" is a troybilt, made for people who do yard work and such, and it cost $300 and change. Sure worth more than a little gas I don't know about.
I like the Husquvarna chainsaws myself.
I have three of them, all older than the hills, and still running strong. I am getting old, and I don't run two of them very often because they are so big and powerful that they scare me.
Heck all chainsaws scare me. One slip up and they will right eat your lunch. I treat chainsaws with the same respect that I do firearms. I use them, but I try to be extra careful. Maybe that is why I still have both legs.
Getting the oil mixture right is important for the 2 cycle stuff. I would rather error on the oil rich that the other way. Of course I try not to over do it.
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  #12  
Old 11/14/06, 09:16 PM
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Seems to me that those bottles labled for different mixes are just different amounts in the bottle to mix with (a) gal of gas.
And labled as such.
You can buy a measuring cup for this, marked off for different mixes and different amounts of gas.
Then buy the 2-cycle oil by qt or gal and mix your own, it's much cheaper.

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