ok so iv been mixing 32.1.using 1 cup in two gallons.then i was told to mix 50.1.but the guy mixing 50.1 said he put 10 ounzes in five gallons.and he was mixing it in a dirtbike thats suposed to be 32.1...my question is whats the correct measurment of oil to gas for two gallons.am i doing this...