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Very interesting comment in there. I was noticing more whirring noise after installing an oil cooler. Looks like they heard it too. Not sure it's related to engine oil though.
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07-21-2010, 09:27 AM
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A True Z Fanatic
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Very interesting comment in there. I was noticing more whirring noise after installing an oil cooler. Looks like they heard it too. Not sure it's related to engine oil though.
Quote: For experimental purposes, we measured interior noise both before and after a switch to conventional oil. We found there was a noticeable gain of about six decibels at middle revs in 1st gear but no real discernible difference in maximum cabin loudness. Sans sound meter, some complained about the increase of whirring sounds at low rpm over time, which are reminiscent of radio speaker feedback from an improperly grounded audio system.
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