Since there is no oil pump in a traditional two stroke engine, two stroke oil is added to gasoline to lubricate the engine. The oil coats parts as the gasoline is drawn through to the combustion chamber, and is then burnt along with the fuel. This is where the typical "blue smoke" comes from and unfortunately the main reason legislation exists against two strokes.

There are two main types of two stroke oil on the markets: non-synthetic and synthetic oils. I hope to add to this page in the future with more info, but for the most part the only difference I have seen on standard motors using synthetic vs. non-synthetic is that the inside of the motor and piston area is much cleaner after many miles using synthetic. Any comments on this would be appreciated.