Switching to Synthetic Oil on Used Car?

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#1 (permalink)

11-18-2010, 03:42 PM

Rare Iron

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Join Date: Sep 2006

Location: Highland, MI

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Posts: 221

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Switching to Synthetic Oil on Used Car?

I know this is not Cobra related, but it would apply to any engine. Would there be any downside to switching to synthetic oil on a 100,000 mile engine that has lived it's whole life on regular oil? Car is a 2001 Chrysler 300-M with the 3.5L. Will the synthetic oil "clean-up" the inside of the motor IF it is sludgy? (I'd bet the inside of this engine is very clean though as the car was meticulously maintained). I just like running synthetic in all my vehicles compared to regular motor oil.

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