What is the recommended amount of Ringfree to use???

I am sure a bottle in the US says 1ounce/10gallons of fuel.
In Canada it says 10millilitres/litre of fuel.

4 liters in a gallon(approx) and 33millilitres in an ounce.

See my problem


Is there just a typo on the Canadian label, or with the exchange rate, is our ringfree less powerful??


Here's hoping it's still 1 ounce / 10 gallons