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Originally Posted by Brucelee
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Secondly, Porsche recommends an oil filter every OTHER change, which is exactly opposite to what most oil engineers would tell you. In fact, where truck fleets use synthetic oil and change at 25K miles, many actually change the filter at 12.5K miles, as recomended by AMSOIL.
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I know! I just read that last week or so. A filter change every 30k miles!! Crazy Germans have lost their minds. lol