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Old 08-06-2001, 05:39 PM
rickjordan rickjordan is offline
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Join Date: Nov 2000
Location: Vernon, CT
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As Longston said, use what your manual calls for. My VW owner's manual says to use 5W-40, but 5W-30 can be used if 5W-40 is not available. So "40" is the perferred weight. My '80 SD's manual says to use 15W-40 for temps above 23 F. Below that, use 10W-40 or 50. Again at least "40". Domestic and Japanese cars call for anything-30. It seems everything from Europe calls for the heavy oil. Look what Porsche is factory filling their cars with, 0W-40 Mobil 1. There's that number again, 40.
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