My 2.2 has recently started drinking a lot of oil.
I serviced it about 4 months ago, and haven't been checking the oil, but last week I checked it and there was none on the dipstick. It took a full 2 litres to bring it up to max.
Today I checked it again and its way down again - took about 3/4 litre.
Engine still feels smooth and pulls OK, and there were no warning lights or messages. What are the chances of not having done serious damage to the engine, and what's going on? (I suspect piston ring, but why would the engine still feel smooth?)