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1974 Plymouth Valiant - 2013 Dodge Dart - 2013 Chrysler 300C
25,867 Posts
A big +1 to Curtis.

I remember mechanics telling me to use 10W30 in my ol' 2.2. Yeah, right. It ticked and made noise when cold. I went to 5W30 and never looked back. Ditto on the 300M's 3.5 engine. I won't talk about "too thick" or "too thin" because I don't know anything about metallurgy and I don't know much about oil, but I do know that I'll believe engineers at the CTC before I believe a guy who, regardless of how skilled he is at fixing cars, is probably guided more by what he's used to than any actual knowledge.

PS> And frankly, the guys who talked about "thick oil" and such are not the ones who were skilled at fixing cars.
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