40:1
2.666 to 1
The 1987 model, 40 hp Mariner outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
3/8
4 to 15 exclusive 4 to 17 inclusive
3 to 8
When mixing oil with gas you must first determine what ratio is required. Most 2-cycle engines require either a 32:1 or 40:1 ratio. That's 32 or 40 gallons of gas for each gallon of oil.
The ratio of their volumes is 2/3 .
10 gallons is less than 6 quarts, because 10 gallons is 40 quarts. There are 4 quarts in a gallon.
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To convert 15 quarts to gallons, you would divide by the conversion factor. Since 1 gallon equals 4 quarts, the ratio would be 1 gallon/4 quarts. Therefore, to convert 15 quarts to gallons, you would multiply by 1/4.
Every 40 ounces of gasoline add 1 ounce of oil for a 40 to 1 mix. You do the math.