What can cause vapour or smoke to emanate from the

[slice2020]

I recently changed oil in my diesel kia sportage car. Afterwards i started experiencing oil shortages. I actually top up between one and half and two liters of oil per day. We have checked for possible droppings or leakages but all to no avail. Just today i noticed when i ttok off the lid from the oil tank while the engine was on that there was vapour or smoke coming from the tank. The exhaust does not smoke abnormally anyway.
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kia cars
used honda