Finally did my used oil analysis on my car. Done 18,000km and oil mileage is only 3000km using normal USA formula Mobil1 5w30. After I drained out, I trying out another 504/507 specs oil and this time Mobil1 5w30ESP formulation. I have done 900km and oil never moved on the dip stick! I will be sticking to this oil and extend the oil drain interval to 10,000km instead of 5000km.

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