I have a question. I recently purchased passo 2010. Seller told me that I am using zic A +. So next day I checked oil level, it was very below. Cut the story short I went to havoline outlet and tell him same story. He told me that you should use havoline 10w40 as it is thick and the reduction in oil is observed in 90% JMD Cars. He didn't recommend 10w30 oil as it is not that much thick and he also told me not to use synthetic oil. kindly educate me regarding this issue. Thanks