Hi the two stroke engine has been made in two types. the older type uses oil mixed with the petrol in ratios from 1:16 to 1:40. that was how it was for years till the japanese produced the autolube system back in the late 1960's. this allowed for the two stroke to be like a four stroke engine and have a separate oil feed system. however if this is not mentioned it is better to assume that an engine needs oil mixed with the fuel. what does the oil do in two stoke engine is what you should have been asking. this lubricates the piston in the cylinder then it lubricates the small end bearings in the piston. it also lubricates the big end bearing on the crankshaft and the mains bearings on the crank shaft. without lubrication bearing get hot the get dry and things start to stiffen up. the hotter then get the harder it is for them to turn to the point where motioned stops altogether this is known as seizing up. when the bearing surfaces have welded themselves together. only replacement parts is the answer as the welding action has destroyed them.

Without oil being mixed in with the gas the engine has no lubricant and will seize.

What happens is that the engine won't be lubricated like it needs to be and it will end up seizing

The needle bearings will seize on both ends of the connecting rod as well as the bearings at both ends of the crankshaft. The piston will seize inside the cylinder bore.

Dump or siphon the non-lubricated oil out.

It will seize up in seconds. A 2 stroke has the lubricating oil mixed in with the fuel, not in a sump as in a 4 stroke.

The engine does not receive any lubrication and it will wear abnormally fast and then freeze up.

nothing, the petroleum in the gasoline will lubricate the motor, don't mess around with that pesky ole' oil can.