My 2-stroke motorcycle has a mixing pump which varies the mix depending on RPM ( 133cc Yamaha RZR). Likewise the local 50cc 2-stroke scooters.
Premix I've run 1:25 which is high and smoky but better than a seized engine, which can kill you.
As UCL the ratios are much lower, maybe 1:250 or so, but I've never done that.
Haven't used fluid ounces since the '50's.