Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
Welcome,I have been a professional master mechanic for over 35 years and am happy to help you with this.
Where it usually leaks is the valve cover gasket and oil drips down onto the exhaust manifold and burns off. Very common to need replacement after that many miles.
As far as the oil goes, you should keep using whatever type its been used to with this many miles.
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Thats ok i will answer more in detail for you.
Did you just get the car?
Do you know what type oil it has used in the past?