i mix mine 20 oz to five gallons i think that is a 32:1 ratio
1 1/4 pints or 20 oz. 128 oz per gallon times 5 equals 640 oz, 640 divided by 32 equals 20, so for every 32 oz of gas you will need 1 oz of oil.
approx 1.7 oz
5 gallons x 128 oz/gallon = 640 oz of gas 640/32 = 20 oz of oil
32:1 (4 oz. oil to 1 gallon of gas)
the mix ratio for Lawnboys is 32:1 4 oz. per gallon
Depends on the required RATIO, Your manual should tell you the Ratio and use a calculator to determine the quantities. ex: 20:1 is 20 oz gas to 1 oz oil, or 8/10 oz oil for 1 pint gas. for 32:1 mix 1/2 oz oil with 1 pint gas. for 50:1 mix 1/3 oz of oil 1 pint gas. see: http://www.csgnetwork.com/oilfuelcalc.html 8 pints = 1 gallon so use .125 for the gallons of gas
6.4 gallons.
Isn't an Xr80 a four stroke ? If so, there is no mix ratio, if it is a two stroke by some chance, I would say 32 to 1, so 4 oz of oil per gallon of gas.
3.2 fl oz
Since 128 fl. oz = 1 gallon, use 6 oz of oil ( for 120 oz of gas, to be exact ).
about 20