My Corolla 2004 gli the previous owner change the engine of car and since 2021 I am driving it In start I used shell10w-40 then shift on havoline 10w-30 since then I drive in city after 2000km it reduce oil I live in Quetta recently I visited Lahore byroad my the car was driven about 2000 km on last oil change and gauge was reduce I pour .5liter then gauge was full and last for Lahore driven about 980km saw the gauge it was half then I change the oil again to shell 10w-40 and was there for about 10 days drive about 890 km daily from Lahore bahria town to city And on return I again check the gauge it was low again I pour half of the reming half liter but the gauge was not full when I reached her it was again low now kindly tell me why it is consuming so much oil before my visit it was consuming but not that much there is no visible leak should I change my oil grade and manufacture should I pour Toyota patron oil 10-40 I pour oil from a shell pump near mall spl Shimla hill filling station. Kindly ned expert opinion
