EFI
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http://www.amsoil.com/lit/databulletins/g2880.pdfNope. Specs are available on mfg sites to see this.
5w20 more viscous vs 0w20 at 100C.
Ok, I went straight to Amsoil's website and looked at their viscosity indexes for various oil grades.
0w20 and 5w20 have virtually the same viscosity at 212*
At the same time 0w30, 5w30 and 10w30 have once again pretty much the same viscosity at 212*
Where they differ of course is their viscosity when cold.
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