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I figured the old stuff was better as it poured at a lower temp. Even for guys that do not drive in winter I think its better. Some research I have done indicates, as Andy-AMSOIL in post #8 says that zinc and phos were lowered in the new oil.
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Gone but not forgotten:
1974 Corvette Stingray 454
1986 Z28
2009 Mustang GT convertible
2012 45th 2SS Vert
2013 ZL1 M6
2014 Zl1 M6
2014 GT500
2016 Challenger Hellcat M6
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