Oil mixture

mirman

Active Member
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May 30, 2023
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Location
Florida
I was told that 4 oz of oil was a 32 to 1 mixture. The oil I have been using is 2 and 1/2 oz and says it is 50 to 1. I don't understand the numbers of the mixture. Is the first number the oil or the gas? Is 50 to 1 more oil per gallon or less? Why is 2 and 1/2 oz 50 to 1 when 4 oz is 32 to 1?
 
Why is the break-in at 16 to 1 and after that 32 to 1? Is 16:1 more oil per gallon than 32 to 1?
 
16 to 1 is 16 parts gas to one part oil. So for every 16 Oz of gas there is 1 Oz of oil. So yes 16 to 1 is more oil than 32 to 1
 
Why is the break-in at 16 to 1 and after that 32 to 1? Is 16:1 more oil per gallon than 32 to 1?
More oil is used at break in to protect the bearings and rings as the surfaces wear into each other. It's there to also keep the heat under control as the extra friction during break in causes the engines to run hotter.
 
Just take the number of oz in 1 gallon (128oz) and devide it by the oz of oil you are putting in. The number that come out will be the ratio to 1. Not exactly the easiest way, but it makes sense.

Example

1 gallon = 128oz

128oz gas ÷ 4oz oil = 32. Thus a 32:1 mix ratio.
 
Also, you know that the petol to oil ratio chart for those members using the METRiC system is somewhat different than what we are using here in the USA...lol...Just saying...lol.

2-Stroke-Mix-Chart-Litres-32-to-1.png
 
16 to 1 is 16 parts gas to one part oil. So for every 16 Oz of gas there is 1 Oz of oil. So yes 16 to 1 is more oil than 32 to 1
The oil I am using is full synthetic and comes in a small package that is two and a half ounces. It says it is 50 to 1 to 1 gallon. The spark plug when I pull it is covered with black soot. Should I use less of this oil?
 
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