Maintenance vehicles must pay attention to science, however, some problems often occur in the car maintenance, some people thought is in the maintenance of cars, but actually self-defeating damaged the car.
Maintenance expert reminds you of the following error is equal to the damaged car maintenance method.
A wax, circle method
Effect is poor a lot of people to the body waxing are habitually to circle way, this is not correct way. Correct way of wax in a straight line, and somehow the line alternates, again according to the last line of rain flow direction, so as to decrease the car paint surface concentric rings halo effect.
Second, the engine oil too much
Fail when lack of oil in the engine oil pan, bearing and shaft friction due to the amount of oil