Most two stroke engines in dirt bikes, snowmobiles, and chain saws require a premixed combination of gasoline and two cycle oil. The gasoline powers the engine while the oil lubricates the cylinder walls and reduces friction which keeps the engine going. Therefore, a proper mix of the two components is crucial in the performance and longevity of the engine.

[edit] Steps

Pump one gallon of gasoline into a gas can.
Measure out the proper amount of two cycle oil in the Ratio Rite.
Pour the required amount of oil into the gas can with the gasoline.
Shake the container lightly until all of the oil is thoroughly mixed in with the gasoline.
Pour the mixture into the machines gas tank.

[edit] Tips

BEFORE USING THIS CHART - MAKE SURE YOU ARE USING THE RIGHT SIZE GALLON - US or IMPERIAL
20:1(gasoline:oil) ratio requires 6 ounces of oil.
32:1(gasoline:oil) ratio requires 4 ounces of oil.
40:1(gasoline:oil) ratio requires 3 ounces of oil.
50:1(gasoline:oil) ratio requires 2.6 ounces of oil.
70:1(gasoline:oil) ratio requires 1.8 ounces of oil.
100:1(gasoline:oil) ratio requires 1.3 ounces of oil.
Use a gas can that holds more than one gallon of gasoline because the added oil could cause an overflow in a one gallon can.
Be sure all of the caps and nozzles are secured on the gas can before shaking.
Thoroughly mixed gasoline will have no light or dark areas and will have even shading throughout.

[edit] Warnings

US GALLONS ARE A DIFFERNT SIZE TO IMPERIAL ONES
Never work with gasoline near open flames.
Always work with gasoline in a well ventilated area.

[edit] Things You'll Need

One gallon of gasoline (REMEMBER US AND IMPERIAL GALLONS ARE OF DIFFERENT SIZES)
Six ounces (or less) of two cycle oil
Gas can
Ratio Rite (used to measure out the correct amount of oil)