Havoline High Mileage SAE 5W20 has HTHS ASTM D4683 typical value of 2.7 mPA.sHavoline High Mileage SAE 5W30 has HTHS ASTM D4683 typical value of 3.4 mPA.s
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Thanks for asking and posting. That is a decent HTHS for the 5W30, most ILSAC 30 grades are about 3.0 or 3.1 cP. The Euro grades start at 3.5 cP, so this HM oil sits nicely in the middle, which I like.
Here is a link to their PDS [Havoline HM PDF]
They are definitely on the thick side which I like, a semi-synthetic, with TBN of 8.5, Zinc at 880 ppm, and SA of 0.9%. Bang-on for a SN & GF-5 oil.
0W20 = 8.4 cSt
5W20 = 8.8
5W30 = 11.8
10W30 = 12 cSt
Looks like good stuff to me.