Help with fuel / oil mix ratio

Ron-P

New Member
Jan 21, 2009
50
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Surf City, CA
I'm new here with a new bike. I have a 2-stroke 80cc engine and was wondering what the ratio is for mixing. I searched and see posts with 16:1, 20:1...etc., but I'm not clear on what that exactly means. I've never had an engine where I had to mix the oil with the fuel.

The guy I bought the bike from told me 4.1oz of oil to 1 gallon of gas, does this sound correct? How does that translate, or does it, into the figures above?

Happy Motoring!
 

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
11,843
236
63
up north now
If you look at the bottle of 2 stroke oil, you will see the correct amount to mix with a gallon of gas.

You want to mix the first tank at 20:1, then go to 24:1 for another gallon.
After that some guys go to 32:1 synthetic. I use 24:1 "regular" 2 stroke oil.
 

seca40

New Member
Nov 15, 2008
131
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0
Albuquerque
The guy I bought the bike from told me 4.1oz of oil to 1 gallon of gas, does this sound correct? How does that translate, or does it, into the figures above?

Happy Motoring!
Is this a new engine? Did the guy you bought it from ride it much before you got it? Bikeguy is referring to the break in period for a new engine. First gallon second gallon etc...

128 oz. per gallon
1 0z of oil = 128 : 1 mix
4 oz of oil = 32 : 1 mix and so on.

Or use this.

Gas Oil Mixture Ratio Calculator