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Old 09-22-2002, 03:31 PM   #1
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Member#: 15559
Join Date: Feb 2002
Default Oil viscosity - owner's manual contradicts service manual

The Owner's Manual that came with my 1997 L (2.2 liter) says that 5W-30 is the preferred viscosity. The Owner's manual also says that 10W-30 and 10W-40 are permitted, so long as the temperature is above -5 degrees F. The factory Service Manual says that 5W-30 should not be used above 30F and says in bold letters that 5W-30 should not be used for sustained high-speed driving. What gives? I drove around all summer using 5W-30, so this issue is really getting under my skin.
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