Q:

# How many ounces of oil should one use for a 50:1 oil-to-gas ratio?

A:

For a 50:1 oil-to-gas ratio, use 2.6 ounces of oil per gallon of gasoline. In other words, for 2 gallons of gasoline, one would need 5.2 ounces of oil.

## Keep Learning

There are 128 fluid ounces in one gallon. To calculate the appropriate amount of oil for 1 gallon of gasoline, divide 128 by 50 for the 50:1 ratio, which equals 2.56. Rounding up that number to 2.6 will provide the appropriate quantity of oil for the ratio.

This same formula can be used for other ratios. For example, a 40:1 ratio requires 3.2 ounces of oil because 128 divided by 40 is 3.2.

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## Related Questions

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To make a 50:1 ratio mixture of gasoline and motor oil, add 30.72 ounces of motor oil to 12 gallons of gasoline. This concentration is often used in small power tools, such as weed wackers and snowblowers.

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To use a fuel-to-oil ratio mixing chart, determine the ratio of gasoline to oil that the relevant two-stroke engine requires. This is listed in the owner's manual, or somewhere on the engine. Then, find the chart that displays the corresponding gas and oil values for that ratio. Search for a specific amount of gas, and look in the oil column to find the amount of oil the gas needs to be mixed with to create the appropriate ratio.

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Preparing the correct fuel mixture for a two-stroke gasoline engine requires determining the correct ratio of gasoline to oil for the engine in question and then mixing at the correct ratio. Ratios of 32:1, 40:1 and 50:1 are commonly used. The ratio required by a particular engine is specific to that engine and should be listed in its documentation.