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Containment of Dirt in Engine Oil During Extended Oil Drains
 
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Question:
Containment of Dirt in Engine Oil During Extended Oil Drains
I have been changing my own oil for many years now. I always change it between 3000-3500 miles and I see how dirty my oil is first hand. You now advertise an oil that lasts for 15,000 miles. While this is a great breakthrough, my question is what happens to all the dirt that becomes trapped within the oil during this extended time and can a regular oil filter handle it?
-- Harry Dieterich, Bethlehem, PA
Answer:
Mobil 1 Extended Performance is fully synthetic motor oil that will help extend your engine life, reduce oil breakdown and minimize engine wear while keeping your engine clean through special cleaning agents.  Because of the higher quality components and base oils used in Mobil 1, many of the contaminants of oxidation that are created in conventional oil are reduced so the filter life is extended as a result, as well.
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