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Life, we are in the process of car repair, do not be oiled tire bolts and nuts, here is our Hyunto auto parts manufacturers introduced: wheel maintenance, a few private car owners in order to prevent rust on the wheel bolts and nuts, when installing ingenuity to bolt and nut are greased, not knowing that this approach is not only wrong, but also to bring some traffic safety risks. After tightening the bolts and nuts, mutual self-locking characteristics. And after greased self-locking coefficient between the two small, self-locking performance. When the car at high speed, it is easy to loose bolts and nuts and even fall off, causing traffic accidents.