Ratio for oil and gas on a ryobio weedeater

Two cycle engines run on a mixture of gasoline and oil. Each engine type is designed to run on a specific gas-to-oil mix ratio.
IMPORTANT: Use only oil that is labeled for use in "Two-cycle" or "Two-stroke" engines. Home Depot and other stores now have "premixed fuel" of gas and 2 cycle oil.
To mix two-cycle fuel, start by putting correct amount of oil in gas can. Then slowly add correct amount of gasoline. Do not try to mix gas and oil directly in gas tank of equipment.

IMPORTANT: Do not use any fuel that is over 30 days old. Do not mix more fuel than you are likely to use in a month. Old fuel can gum carburetors and prevent starting. Always use fresh fuel.

The chart below shows correct amount of oil per gallon that each mixing ratio requires. Expect that yours will be between 32 gas to1 oil and 50 to 1. 32:1 and 50:1 are most popular.
Ratio GAS:OIL UNITED STATES OIL per 1 U.S. GALLON Gasoline
(128 oz.) *INTERNATIONAL OIL per 1 IMPERIAL GALLON Gasoline
(160 oz.) *INTERNATIONAL OIL per 1 LITER Gasoline
(metric) 32:1 4 oz. 5 oz. 31.25 mL 40:1 3.2 oz. 4 oz. 25 mL 50:1 2.6 oz. 3.2 oz. 20 mL

The ratio is 40:1 Just add 3.2 ounces of 2 cycle oil to one gallon of fuel. Be sure to cap off the tank and shake to distribute the oil throughout the fuel before adding to weed eater.

Hi lcauchon...

Use a 50:1 ratio 1 pint 2 cycle oil to 6 gallons of gasoline..
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should be written in the manual and on the lid if not i always run 40 to 1 better safe than sorry to much oil ratio can foul a plug running to light on oil can blow the motor

4 oz generic 2-cycle oil to a gallon of fuel for a 32:1 ratio. It using JD Exact oil the ratio is 50:1 using 2.6 oz of JD Exact oil.

I hope this helps you.

100 ml of 2cycle oil to 4000 ml of fuel..Which is 40/1 ratio
100 ml of 2cycle oil to 5000 ml of fuel.. which is 50/1 ratio

4 o/z is 118.29411875006815 ml to 1 gallon of fuel (3.79 litres or 3790 ml) Which means 32/1 ratio...I find that to confusing,so it is easier to say 100 ml of oil to 3200 ml of fuel ===32/1.

50:1 is too high. That is normally for a chainsaw which is much more severe duty. Normally for a weed whip its 25:1. They usually say on the gas cap but if not 25:1 is a good ratio that never fails (have done commercial landscaping for years) I use this ratio if I don't have a guide from the manufactor of the weed whip..

40:1 is the recommended ratio by the company that made the weedeater. But it has been my experience that 32:1 allows the engine to last longer.

usually it is a 40:1 ratio . the ratio should be printed on gas cap for one gallon 40:1 would be about 3 oz.

this mixture for this weedeater is 40:1 or 40 to 1

Hope this helps You
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