2001 Accord V6 owner's manual says 5W20 for all weather. My 1999 2.3L 4cyl Accord manual gives ranges of different oils based on temperature. I've been running Castrol GTX 10W30 in the both, but the wear metals are a tad higher in the V6 and I'm wondering if the 10W30 is too thick and I should use 5W20. Anyone know what they recommend for European Honda 3.0L V6 engines? That usually tells the tale.
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