difference in 2 cycle oil small engine / atv injector oil

Hi everyone,

Is there any difference in 2 cycle small engine vs 2 cycle injector oil?

Background, sold my ATV (400 2 stroke) which has been looked after for 20 years, always used Polaris 2 stroke injector oil. This ATV didn’t see mud or water,light work around the house, take kids for drive in the neighborhood…etc.

Young Lad I sold it too contacted me to say the engine seized on second trip on the bike, first trip bike worked "awesome", put some oil in it and seized while riding the second trip.

He says he put "2 cycle oil for small engines from a small container"

I told him up front when he purchased it, the in’s and out’s from a to z…again this bike was well taken care of. Manual went with bike when sold. He test drove the bike, his buddy did too.

So what is the difference between atv 2 cycle injector oil and 2 cycle small engine? Is this the cause?

Thanks