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Old 05-24-2013, 12:55 AM
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highlandchef highlandchef is offline
Conventional Eccentric
Join Date: May 2011
Location: New York
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Vehicle: 2009 Dodge Ram Crew Cab
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Originally Posted by ValleyRacer View Post
Are your cold temperatures in South Carolina that low that you need 5w (-30 degrees) on the left figure?

True enough synthetic is versatile in temperature viscosity, but 5w?
The K&N filter is a top choice filter for sure. Keeps the oil clean a long time.
Well your manual calls for it.

I run 0w-20 and I live in NY not the tundra. There is more to the left number than just its most extreme low temp. Even in the heat of summer an engine isn't at operating temp if its been sitting for any length of time. The lower the left number the better the oil will flow at start up. The right number is the one needed to protect the engine at operating temp. With synthetic oil there is no disadvantage to running a lower left number. That is not necessarily the case with Dino oil.

Disclaimer: I'm getting old and my opinions will reflect that fact!
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