Best Oil Mixture for old saws

What is it best Oil mixture for old chainsaws? that you should use 30,40 SAE oil what it says but using different oil change the mixture right now I am using 50:1 sthil oil

The 50:1 will be OK..

I would use a quality synthetic at 40:1..in a 'really' old saw..

But that's just me..!!

J2F

+2
Use the same mix you use in all your 2-strokes.

The earlier saws came with the manufacturer's recomendation of 16 parts gasoline to 1 part 30wt motor oil. Your 50:1 mix using modern 2-cycle oil will lubricate better than the old 16:1 mix. As the 2-cycle formulations got better over the years, the standard mix ratio moved from 16:1 to 50:1. Some users get along with certain oils mixed at 100:1.

McCulloch1-52 said:

What is it best Oil mixture for old chainsaws? that you should use 30,40 SAE oil what it says but using different oil change the mixture right now I am using 50:1 sthil oil

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Maybe it's just me, but I can't read that.
Igpoe

There's an exception to the 50:1 mix ratio: engines with plain-bearing rod big-ends, like some Clintons.

Some of them with aluminum rod run 12:1. Sure wouldn't want to be downwind. Otherwise 50:1 here.

I run 32:1 in everything, old and new..

Rick

CTYank said:

There's an exception to the 50:1 mix ratio: engines with plain-bearing rod big-ends, like some Clintons.

Some of them with aluminum rod run 12:1. Sure wouldn't want to be downwind. Otherwise 50:1 here.

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Sorry, but what is a plain bearing? Roller? Needle? Bushings?

same as a new saw.........................for me its 25:1

You should pull the ethanol out of the gas. From what I've heard, the older saws aren't used to the hotter running conditions ethanol creates (makes sense, it wasn't there when they came out).

But why would any engine want to run hot? I pull the ethanol out of all of my gasoline, including that which goes in my gas car.

How does one pull the ethanol out of his gas?

I mix 2 quarts of water w/ 5 gallons of RUG in a clear container with a drain valve in the bottom of it. Shake it up good, come back tomorrow, you'll see a clear separation between the two, the gas is on top.

Drain it!

Done.

I used to buy ethanol free, it was a 15 mile drive (as opposed to the 8 minute walk to my local station), but the station that provided it finally stopped doing so.

I forgot to explain the "why"

Ethanol dissolves in water. Gasoline doesn't.

There's another way to do this, it involves heating the gas, and they'll separate, as ethanol and gas have different boiling points. Never done this method, though I've heard of it from a number of sources. I'm sure it's quicker than my method, but adding water to gas is less effort than heating. The less effort the better for me, that's why I use a chainsaw!

Sounds like a neat trick! The water draws the ethanol out of suspension, right? And you could verify it works by measuring the volume of water you drain. It should theoretically be more than 2 quarts when you drain it off, right?

bplust said:

I forgot to explain the "why"

Ethanol dissolves in water. Gasoline doesn't.

There's another way to do this, it involves heating the gas, and they'll separate, as ethanol and gas have different boiling points. Never done this method, though I've heard of it from a number of sources. I'm sure it's quicker than my method, but adding water to gas is less effort than heating. The less effort the better for me, that's why I use a chainsaw!

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I'd be careful heating gas, in order to distill off vapor. You might end up on the evening news.:msp_sad:

Ya, I end up draining a gallon of crap out (2 quart water plus, in my case, 10% of 5 gallons, 2 more quarts).

Ethanol ain't exactly good for the delicate parts of a saw fuel system. Alcohol is good for lots of things... like removing paint! So it might just have some corrosive properties. It's death for fiberglass fuel tanks (boats).

And it's never been used in aircraft fuel, except experimental purposes, so what does that tell you? I guess the government's nice enough to not kill you by screwing up your engine 1000+ feet in the air, but they will destroy all of your other internal combustion engine-driven toys.

There's a lot of literature about this. When searching the internet, there's definitely tons of biased private interest/government bulls**t to dodge.

Not to get too off topic, but you folks with gas vehicles will notice better fuel mileage, as ethanol has less embodied energy than gas. And more power too, of course!

bplust said:

I mix 2 quarts of water w/ 5 gallons of RUG in a clear container with a drain valve in the bottom of it. Shake it up good, come back tomorrow, you'll see a clear separation between the two, the gas is on top.

Drain it!

Done.

I used to buy ethanol free, it was a 15 mile drive (as opposed to the 8 minute walk to my local station), but the station that provided it finally stopped doing so.

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Wow, I am going to have to admit there was finally something I didn't know.:msp_rolleyes:

I just found this:










Anyone with a sufficient understanding of solubility can extract the ethanol from gasoline using little more than water. Chemists have an old axiom that "like dissolves like" with regard to polarity. That is, polar compounds dissolve other polar compounds and nonpolar compounds dissolve other nonpolar compounds. Water is polar, whereas gasoline is nonpolar. Ethanol exhibits moderate polarity and mixes with gasoline. The ethanol, however, dissolves better in water. Thus, if a person mixes gasoline and water, the two liquids will separate into layers with the water on the bottom. Vigorous mixing of the mixture, however, will transfer the ethanol from the gasoline to the water, where it is more soluble. The separation is then just a matter of "pouring off" the gasoline. Chemists perform this operation somewhat more elegantly with a piece of glassware called a separatory funnel, which simply consists of a cone-shaped flask with a rotating valve at the bottom.

Related Searches: Bottle Water
Water Leak
Difficulty: Challenging
Instructions



Things You'll Need
Separatory funnel
Plastic funnel
Gasoline
2 small glass jars
Adhesive labels
1 g anhydrous magnesium sulfate
Glass funnel
Filter paper


1


Fill the separatory funnel about one-fourth full with water, making sure the stopcock is closed so no liquid flows out the bottom of the funnel. Then fill the funnel to about the half-full point with gasoline using a plastic funnel to prevent spillage during the transfer.

2


Insert the funnel's stopper, then, while holding one finger over the stopper, invert the funnel and shake it two or three times. With the funnel still inverted, rotate the stopcock to the open position to vent any gases or fumes that may have formed.

3


Repeat the shaking and venting process from step 2 two or three additional times.

4


Turn the funnel so that the stopcock is facing down and allow the two layers to separate for 1 to 2 minutes or until two distinct layers become visible.

5


Hold the funnel over a small glass jar, then open the stopcock and allow the bottom water layer to drain into the jar. Label the jar "water/ethanol" with an adhesive label. Then pour the gasoline layer out through the top of the flask into a second glass jar labeled "gasoline."

6


Add about 1 gram of anhydrous magnesium sulfate powder to the jar containing the gasoline and swirl for 30 seconds. The magnesium sulfate will absorb any water that may still be mixed with the gasoline and form a solid clump in the bottom of the jar.

7


Place a piece of filter paper in a glass funnel and place the funnel on top of an empty glass jar. Slowly pour the gasoline through the filter paper. The filter paper will catch any solid pieces of magnesium sulfate. The jar should now contain gasoline that is free of both ethanol and water.




Read more: How to Remove Ethanol From Gasoline | eHow.com How to Remove Ethanol From Gasoline | eHow.com

I put a drain valve on the bottom of a glass carboy, but that'll work too of course.

You fellas who still have ethanol free provided at stations are lucky!

That's really cool! I guess I could skip the magnesium sulfate part of the process and still have much improved fuel compared to what i started with...OR, could you allow more than 2 minutes-or overnight, as suggested-and get ALL the ethanol/water out? I'm gonna start doing this!

I recommend it!

I don't really drive my gas rig (I'm a diesel guy), it's only for emergencies (if it's brutally cold outside and I need to go somewhere and didn't prepare via plugging a diesel rig in), so I haven't tested this theory myself, but an older mechanic neighbor of mine claims that he cannot accelerate up certain hills in his Jeep with ethanol in his fuel, but can without it.