1 qt to 12 gallon of fuel
it is prefferable to use 10/30 oil mixture because it doesn't harm the motor and the mixture's density is proper
20/1
50 to 1
50:1
50:1
50:1 I believe
50:1
50:1
50:1
50 to 1 oil and gas mixture
Mercury outboards prior to 1966 use a 24:1 fuel to oil ratio.
50:1