Good, you have to place the oil indicated by the manufacturer, now check the admission, where it connects with the PCV, if it is very full of oil, it is lowering compression, which heats the oil more by evaporating it faster. Check if there is smoke in the exhaust outlet, it can be wear on valve tires, or more critical, wear of the rings and / or cylinders, lowering compression inside the engine evaporating oil faster, and filtration into the combustion chamber What produces more consumption. There are many who put thicker oils, but in these new cars, the oil galleries are designed to flow in them, a lubricant of specific characteristics, greetings.