BriarcliffMx
PR Founding Father
hmm, never though of it that way. Kinda the opposite of the humidity deal in the summer, less oxygen, blah blah blah.
Because adding oil to gas creates more total volume of fuel but less of it is gas depending on the mixture ratio.
Think about it this way:</O
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Every time the piston comes around the volume in the combustion chamber is fixed. …..Think about it.
Ok, got that concept…
Now remember that only the gas burns, not the oil (it sticks around and lubricates)…. Ok, that makes sense.
So, since the volume is fixed and the oil don’t burn. The more oil in the mixture means less gas in the mixture.
Add in the amount of air (fixed by the carb dia) and you’ll see that the more oil in the mixture the “leaner” the mixture actually is.
It’s a fine balance…..
The oil mixing ratios has nothing to do with “leaning out or richening up” for power on a two-stroke.
It's for lubrication .....not performance...