When Should I Change Oils?
Crankcase oil becomes contaminated by unburnt fuel, water, and similar combustion by-products. Another source of contamination is dirt and abrasive particles from the air.
This contamination will occur in all internal combustion engines but added contamination will result from an incorrectly adjusted carburetor, faulty injectors, faulty or improper operation of the emission control equipment, or Positive Crankcase Ventilation System (PCV), or thermostatic control, failure to maintain air and oil filters and an incorrectly tuned engine.
In time, contamination will reduce the lubricating quality of a motor oil to a point where severe damage to the engine may result. Oil change interval planning avoids this needless engine wear.
Frequent oil changes, based on actual driving conditions, is the best insurance to assist in achieving long, trouble-free engine life.
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