Given that it has oil mixed in the gas, I would not recommend using it in
the car as your cat and oxygen sensor will not like it and could cause
premature failure.

If the mix is 50:1, and somebody puts 1 quart of the stuff in with 15 gallons
of gas the mix goes to 3000 to 1. I'd be surprise if the o2 sensor is that
sensitive. Nobody sells gas any purer than that.