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Old 11-07-2016, 07:01 AM   #9 (permalink)
RedDevil
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The gain is mostly in the thickness when cold.

The 8.* cSt was measured at 100C.
But even the 0W20 oils have a thickness of more than 40 cSt at 40C (104F), that must be over 100 cSt at a cold winter start.
The first digit is more important than the latter. I'd rather use 0W50 than 5W20.
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