Fuel Mix Ratios

It's funny how we have those that go anywhere from 100/1 to the other extreme of 16/1
I think mixes like 20/1 were used 30 years ago and with synthetics, it is not necessary
to use as much.
I guess one could also say that in the old days, the oil caused smoking and dead plugs while today's oils seem to burn cleaner.
I agree with Jim's views above, in that, a little extra oil helps in longevity and is worth using but I have to ask if he is speaking of regular oil or synthetic.
 
Creative Engineering said:
From 16:1-24:1 engine longevity is constant. From there, reducing the amount of oil will exponentially reduce engine life.
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"exponentially"? Absolutely NOT!

I don't want to put you on the spot, but you simply will not be able to prove a Chengine will last any different at 32:1 or 40:1 with a proper oil, vs. 24:1. In fact, I'll call BULL on this one. Use an oil that is designed for 100:1 at 32:1 and you may even be spewing too much oil and certainly not cause ANY wear differences.

Blanket statements just don't cut it in the world of lubricants.

I will say this, though. Those who run lean on oil for "performance" are not correct. Actually more oil (to a point) will help with piston seal, hence higher effective compression and more power. This has been proven.

The reason for running lean is pretty simple. We all breathe the same air.
 
Pablo said:
"exponentially"? Absolutely NOT!

I don't want to put you on the spot, but you simply will not be able to prove a Chengine will last any different at 32:1 or 40:1 with a proper oil, vs. 24:1. In fact, I'll call BULL on this one. Use an oil that is designed for 100:1 at 32:1 and you may even be spewing too much oil and certainly not cause ANY wear differences.

Blanket statements just don't cut it in the world of lubricants.

I will say this, though. Those who run lean on oil for "performance" are not correct. Actually more oil (to a point) will help with piston seal, hence higher effective compression and more power. This has been proven.

The reason for running lean is pretty simple. We all breathe the same air.
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Paul,

You missed my point:

Go back and read it again..."I realize there are a lot of variables to the above" I added this comment to let it be known that it was not meant to be a blanket statement. The 16:1-24:1 values were given as examples not hard numbers based on every type of oil.

I know Amsoil, and other synthetics are excellent and that lower fuel to oil ratios are acceptable using these high-end oils.

No matter what oil you use there comes a point where performance is not enhanced and the engine suffers for a lack of lubrication.

Given any particular oil there is a happy medium between performance, lubrication,and pollution. Experimenting with extreme lean conditions is asking for trouble. There are a lot of new people here who could be misled to believe that less is better as long as the engine still runs.

Jim
 
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Hey when I took of my cylinder head the other day I noticed my engine didn't have much oil on the sleeve. I put plenty in (20-1 or so) the gas is quite old (a month or two). would I be right that the problem is the same with running rich in a car, too rich mixture washing and burnin oil of the sleeve.
jus wondrin
 
You have to remember that there is a constant flow of fresh oil as you burn the gas.
Also 20/1 is plenty.
"There is more to life than MPG"....I like that!
 
HT60CC said:
Hey when I took of my cylinder head the other day I noticed my engine didn't have much oil on the sleeve. I put plenty in (20-1 or so) the gas is quite old (a month or two). would I be right that the problem is the same with running rich in a car, too rich mixture washing and burnin oil of the sleeve.
jus wondrin
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No, a car running rich is different, it's a four stroke.
 
Jim - I hear you. I got a little excited with your use of the word "exponential".

I think we are on the same page.
 
come on guys mix up the fuel and go for it 20 to 1 for those who are afraid to burn the engine up and 32 to 1 for the more daring. or what ever blows up your dress.
I have some of Pablos amsoil I might just try the leanest mix just to see if it will run or melt.
I used to race dirt bikes and there was this one guy who had a 250 Husky no one could beat him and he ran the amsoil at 100 to 1 that bike ran like a scalded dog maybe there is something running it with what called for on the bottle?! I have to put on my latest built engine which the cylinder and piston are not broken in yet so I might just do it at 100 to 1 off the bat to see and I like to let them idle and get just as hot as they can.
Pablo does Amsoil cover a melted piston or cylinder or warranty for anything like what I may do? Not that I want you to I'm just wondering.
I could put to rest the oil mix thing once and for all. I'd abuse it just to see what would happen. What do you think?!
Norman
 
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Norman said:
come on guys mix up the fuel and go for it 20 to 1 for those who are afraid to burn the engine up and 32 to 1 for the more daring. or what ever blows up your dress.
I have some of Pablos amsoil I might just try the leanest mix just to see if it will run or melt.
I used to race dirt bikes and there was this one guy who had a 250 Husky no one could beat him and he ran the amsoil at 100 to 1 that bike ran like a scalded dog maybe there is something running it with what called for on the bottle?! I have to put on my latest built engine which the cylinder and piston are not broken in yet so I might just do it at 100 to 1 off the bat to see and I like to let them idle and get just as hot as they can.
Pablo does Amsoil cover a melted piston or cylinder or warranty for anything like what I may do? Not that I want you to I'm just wondering.
I could put to rest the oil mix thing once and for all. I'd abuse it just to see what would happen. What do you think?!
Norman
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hee hee hee...Hey Norman be careful!!! Just like that Husky at 100:1 you may get goin' so fast your dress gets caught in the rear wheel.

Jim
 
I'll try to keep it down I'll use cloths pins to keep it from flyin open/up but just to be daring I'll not wear my panties underneath.
I'll also carry my Rambo knike to cut myself loose in case the dress gets caught in the chain.
Hey ya'll watch this.
Normanlaff
 
On my KX250 and the new KTM 250XC, the factory recommends 32:1 mix after break in. And these are precision machines.
 
Norman said:
Pablo does Amsoil cover a melted piston or cylinder or warranty for anything like what I may do? Not that I want you to I'm just wondering.
I could put to rest the oil mix thing once and for all. I'd abuse it just to see what would happen. What do you think?!
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Amsoil doesn't recommend 100:1 for everything! 50:1 for these engines. So if you mix 100:1 and ride like a violated ape and your engine meets the terminator, you are on your own.

But as for your experiment, I say go for it. If it explodes I'll personally gather the crowd and pass the plate with the first down payment being my own cash. $50. (this applies to NORMAN only)
 
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i found some air cooled synthetic craftsman 2 stroke oil tonight it is a 40:1 mix I still have a fresh gallon of Dino / Gas to go thru first.
 
Well I ran the engine and didn't have any gas handy what wasn't already mix so I didn't blow it up with a 100 to 1 mix.
I was not impressed with it I left off the base gasket and used a sealant for the base gasket must of been to little or too much advance on ports as it was the biggest dog I've built would not idle unless the idle screw was all the in. **** the light would even kill it first time I've had that happen and changing the plug and coil didn't help so I took it back off and put the old engine back on the bike lights and bike back to normal. I'll try putting on a base gasket later and try it again. I know its a new engine and would run better after getting it broke in. No power on take off and didn't make any until about half way wound out and then stumble at wide open. I used the carb off the engine that was already on the bike and with that engine the carb works very very well. So sometime in the future I'll play with it again unless I or someone needs some parts off it.
I didn't even get my dress above my knees in the testing.laff
Norman
 
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I USE MAXIMA RACING OILS IN MY FACTOR KX125 32:1 . ITS VERY$$$$PRICY BUT WORTH IT! GOOGLE MAXIMA RACING OILS AND CHECK OUT THERE PRODUCTS and stats.... IM IN THE BREAK IN PROCESS BUT AFTER MY FIRST TANK IT DOES a consistant 40.7 MPH on flat ground AND THIS IS ON 16:1 KRAGEN SPECIAL?? after 2 fulll gal , ILL RUN MAXIMA K2 32:1 oh , i gps-ed @43.8 down hill!!!!! haha, cool..
 
synthetic 2 stroke oil is recomended. But where to get it localy? automotive stores here dont have it. Sears? Wallmart? any ideas?
.cargo
 
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i just bought a new gallon of gas and mixed my first batch of synthetic. I have to admit it did improve performance.

I used the Craftsman 40:1 which was the only synthetic i have been able to find.
 
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