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Old 10-15-2002, 03:02 PM's Avatar is offline Moderator
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My father-in-law swore by that stuff - both times he changed to oil in his car in 10 years. If your engine was new or freshly rebuilt and you have been good and changed your oil every 3000 miles with good grade detergent oil, it isn't necessary. In fact, it gives me the willys (pardon the pun) to think of running my bearings and cam in solvent. A lot of chemicals like STP, top oil, and this crankcase flush stuff were invented in the beginning of last century because lubrication technology, metalurgy, and engine technology were in their infant stages. Truth be told, they aren't needed anymore and could cause more damage than they do good.
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