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Old 05-17-2019, 06:22 PM   #18
OldNuc
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Join Date: Apr 2008
Location: Far Southwestern Iowa
Posts: 66,360
 

1998 SC2
Default Re: Switch from 5w30 to 10w30?

The Xw in the product ID has to do with the 32F viscosity and has nothing to do with the normal viscosity at 40C and 100C. The viscosity index gives you a clue as to the viscosity at the normal cold start temps. Using the 0w-30 is not going to hurt anything unless you are buying a low quality synthetic or mineral based oil then you may run into a excessively low viscosity condition at hot operating temperature.

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