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11-07-2008, 01:27 PM
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Drives: 08 3DR 5M Bayou Blue; 09 Fos Join Date: Oct 2008
Location: New Hampshire
Posts: 622
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Specifically, my daughter's owner's manual recommends heavier oil (more viscous at temperature) for highway, towing and high speed highway operation; leading to conclude that the 5W-30 is marginal to begin with excepting "normal" operation.
Sonja's Dad |
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