I've often pondered this myself. Where does the oil go ?
I've seen smoky cars on the motorway which have the obvious black soot stuck to the rear end around the exhaust pipe.
One car I had burned a litre of oil every 300 miles. It had only covered ~18k miles, was less than two years old, no obvious leaks and no soot on the rear end. It took a bottom end rebuild to fix it but there were no obvious leaks other than what you could not see on the dipstick.
That was a FIAT. Loved that car.
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