RL 0w30 vs 0W40

Joined
May 1, 2012
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2,850
Location
Indiana
Are these two oils the same except viscosity? I thought I read that the 0w40 was a little more stout, but I couldn't find that older discussion....

Just got a car of 0w30 delivered today for my winter OCI's in my Silverado
 

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Joined
Jul 11, 2014
Messages
3,730
Location
Paradise of Florida
Other than visc, that line is all similar.... heavy dose of moly and a little more enjoyable z/p/s/ca level for those of us that want full saps.

 
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