Why is my Bora so waste oil these days?

Did you forget to maintain it? If the gasoline filter is not replaced in time, it will consume a lot of engine oil. In addition, if the oil is not changed after the mileage is reached, the engine will not work normally, which will also lead to fuel consumption. I suggest you replace the third filter and oil. I don't think it will have such a big impact even if the warm air is turned on. My Jetta is also heated, and now it's more than seven o'clock in 100 km.