Honda City 2007 idsi...... Engine oil level is dropping or even empty after sometimes. Machanic suggest to change the assembly, Available at shoba Peshawar for 15k,(japani). so should I go for it or need to look at other things too. Fuel consumption is good as it is total petrol driven no cng instal. Last week went to islambad with a full tank, which gives me 670km. So no issue for me on fuel. Just this engine oil bothers me. And every morning after ignition a mixture of water and black oil blows out from cylenser. Need expert opinion.