Do car manufacturers know the fact that 5w-30s (besides PAOs) shear to a 20w by then end of the OCI?
Since I can't quite justify spending the money on Amsoil or Redline, I was pondering on the idea of running a Group III 10w-30 in my 2009 Nissan that call for 5w-30. And I wouldn't hesitate to use it in my Ford that calls for 5w-20 after seeing the UOA thread where the OP used 5w-20 in his Mustang.
I live in an area where it's above 32F at least 11 months out of the year, so the cold start benefits of a 5w probably aren't seen anyway.
Since I can't quite justify spending the money on Amsoil or Redline, I was pondering on the idea of running a Group III 10w-30 in my 2009 Nissan that call for 5w-30. And I wouldn't hesitate to use it in my Ford that calls for 5w-20 after seeing the UOA thread where the OP used 5w-20 in his Mustang.
I live in an area where it's above 32F at least 11 months out of the year, so the cold start benefits of a 5w probably aren't seen anyway.
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