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Old 07-12-2002, 05:35 PM
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tvpierce tvpierce is offline
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Join Date: Feb 2002
Location: Portland, ME
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It's my understanding that heavier oils (10-40/20-50) are really just lighter oils with a "thickening agent" (similar to STP) added to them. So they're just making your oil pump work harder, but not lubricating any better.

Jeff Pierce
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Jeff Pierce

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