Trying to Find 2 Cycle Oil

My father uses two stroke oil for many of the machines that he uses around his house. He tries to purchase it online whenever he gets the chance, because he claims he can usually get a far better price there, than he might at a local hardware store. Sometimes, when he is deep in a lawn project or something similar, he runs out of oil at an important moment.

Once he sent me to get him some 2 cycle oil. I had a pretty hard time finding it. I didn’t know exactly what type of oil he was looking for. I went to a hardware store, but there were far too many types to choose from. At the hardware store, I had to choose from sport brands and ones that produced less smoke. I ended up buying something random, since I had no idea what my father wanted.