He premixed with it or put it in the crank case? Either way the motor will be fine. If its in the case just swap it out for 20-50. If its in the gas drain the tank if you want, you dont have to though its still oil in the fuel. Just make sure he mixed it to 32:1.
thats fine to put into the crank..isnt that whats recommended? or is it 10-30? either way as long as he didnt mix it into the gas or the oil injection, and if he did..just drain it lol. problem solved