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oil quality

  1. YF (2011-2014) Sonata/i45
    I drive a 2011 hyundai Sonata 2.4 GLS, the mileage is about 140,000 bought as a pre-owned. please can anyone tell me why my engine oil burns up totally every two weeks..... I had it checked more than enough times its not leaking anywhere, no where,none...cap is tight etc. why is it doing this,i...
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