I bought a generac generator 3300. Is it already filled with oil?? If not does it come with it and how much does it hold.

oil is shipped with the Generator, in a separate container, not in the machine

It is not already filled with oil, though it does come with the 0.6 quart that it requires.

Mine did not come filled with oil but came with a 1-quart container which was more than enough.

For testing purposes out of manufacturing, the portable generator will be filled with a small amount of oil. Considering this, there may be a limited amount of oil in the unit upon purchase; the unit will not be full. Generac’s GP3300 portable generator, model number 6431, features an oil capacity of 0.6 quarts (0.568 liters). When filling the unit with oil, be sure to add oil slowly, to ensure that it is completely filled, and to avoid overfilling the generator.