一、忌添加过多。发动机油底壳内的机油过多，超过油标尺的上刻度线，机油容易窜入燃烧室，使排气管喷机油、冒蓝烟。这样会增加机油的消耗量，而且未完全燃烧的机油会在活塞顶部及气门座上产生大量的积炭，加剧机械零件的磨损，甚至造成活塞咬死或损坏。二、忌不及时添加。在 First, avoid adding too much. Too much oil in the engine oil sump over the upper scale of the oil dipstick, the oil easily flee into the combustion chamber, so that the exhaust pipe nozzle oil, blue smoke. This will increase the oil consumption, and incomplete combustion of oil will produce a lot of carbon deposition on the piston top and valve seat, exacerbating the wear and tear of mechanical parts, and even cause the piston to seize or damage. Second, avoid adding in time. in