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Again. Why ball bearings in the wheel of the car under high presure of weight and sudden hits to pot holes do not require grease change whereas engines need oil change.
I simply dont believe the oil sellers that we should change the oil so often. Maybe once every 1 milion miles would be true. What matters in the life of an engine is the way of driving. You can change the oil every 1000 miles but if you drive the car reclessly your engine will be destroyed.
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