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Old 11-20-2010, 09:03 AM   #7
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,261
Yes, the XW-40 weight does matter; XW-30 is too thin for the M96 engine once it is warmed up. Considering your location, something like Castrol Syntec 5W-40 would be a good choice..........

The reason Mobil 1 has fallen from grace is that it has been reformulated into a poor performing shadow of what it once was.
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