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Old 09-23-2002, 12:48 PM   #2
Stanley
Scooby Guru
 
Member#: 7374
Join Date: Jun 2001
Location: North Bay, SFCA
Vehicle:
2007 Grandpamobile
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I'd use the heavier weight...
This is funny to me, because there was a thread about oil weight going on a few days ago and some folks suggested using heavier weight oil and a couple dudes chime in with: "OOH, you people think you're smarter than the engineers who wrote the owners manual!"
The reason newer cars recommend 5-30 is because it is thinner and has less resistance. This yields slightly better fuel economy but does does not provide more protection for your engine.
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