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I run 0W40 or 5W40 year round since 2014 when I changed the rod bearings. In the winter, I have driven in as cold as -20F which is -29C. Summers don’t get past about 95F.
I am thinking about changing to 5W50, but am not sure it matters for my street driving. For 0W40 and 5W40 brands, I use Mobil 1 or Castrol although I once ran Shell T6. For 5W50, I would probably run Redline though Mobil 1 has it also.
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