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What oil is best? and what ratio?

Keith Gandy

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Ok. Thanks for the info. [emoji106]
I know thats probably contrary to what we may have heard in the past? Its been said before that using too much oil produced too much carbon buildup but running too much oil and tuning too rich is like pouring water on a fire so to speak. Too much oil and tuned too rich will keep the oil from combusting and result in a wet piston crown, combustion chamber, and exhaust system. Carbon is a byproduct of the combustion process but if the oil never has enough temperature or load it wont combust and produce carbon and will instead stay wet and wash the piston
 
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RI Chevy

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I will say that Saber does burn clean at 40:1. But the Motul 800 I ran at 40:1 seemed to burn the same. I pulled muffler and inspected after I ran a gallon of each. Both pistons, insides, exhaust ports, etc looked clean in the same way. Both pistons had a nice oil shine. ???
 

Keith Gandy

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I will say that Saber does burn clean at 40:1. But the Motul 800 I ran at 40:1 seemed to burn the same. I pulled muffler and inspected after I ran a gallon of each. Both pistons, insides, exhaust ports, etc looked clean in the same way. Both pistons had a nice oil shine. ???
It isnt combusting if the crown is wet
 

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Not really, just when I was looking at the piston skirts and under the rings. I guess the sides of the piston. Exhaust port was dry, but with a slight thin carbon film.
Nothing like when I was running Benol at 32:1. Lol.
 

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Thinking outloud here for a moment. Are both of you stating that one could run a 32:1 mix and tune slightly leaner and still get combustion with a dry piston top?
I guess what I am asking is, is the tune more important than the ratio? Can one tune the saw for higher RPM'S with a lower mix ratio (32:1 vs 50:1), and have equally running saws?
Or is it the oils combustion qualities that are more important?
 

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On the 4th tank of a 2 gallon batch of Koolaid (red armor) for my next take down...

36:1
xoh64z.jpg
 

RI Chevy

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Is there a good place where I can find a mix ratio chart for 2 stroke. I have a couple of small graphs, but not enough ratios.
 

Keith Gandy

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Thinking outloud here for a moment. Are both of you stating that one could run a 32:1 mix and tune slightly leaner and still get combustion with a dry piston top?
I guess what I am asking is, is the tune more important than the ratio? Can one tune the saw for higher RPM'S with a lower mix ratio (32:1 vs 50:1), and have equally running saws?
Or is it the oils combustion qualities that are more important?
Both. Example would be 800t. Tuned rich at 32to1 with minimal load and the piston will more than likely stay really clean and likely wet. That oil takes a good load and temperature to combust
 

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OK. So at 32:1 Motul 800, I should tune for a little leaner high end for better combustion and complete burn?
 

Keith Gandy

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OK. So at 32:1 Motul 800, I should tune for a little leaner high end for better combustion and complete burn?
I would think for general firewood blocking 40 to1 or 50to1 would be plenty if tuned correctly with 800t. U could take an oil like 2R that combust more readily at 32to1 and still have more oil in the bottomend but combust better for performance if the performance end matters to u
 
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