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chris719 · 09-27-2014, 03:34 PM

HTHS is not the same thing as shear resistance. The oil with the larger viscosity spread will almost always shear faster due to the increased use of VII polymers.

The film strength (HTHS) of the higher viscosity oil is stronger, obviously.

09-27-2014, 03:34 PM	#49
chris719 Major General 7803 Rep 7,662 Posts Drives: '08 M Roadster Join Date: Oct 2007 Location: NJ iTrader: (1)	HTHS is not the same thing as shear resistance. The oil with the larger viscosity spread will almost always shear faster due to the increased use of VII polymers. The film strength (HTHS) of the higher viscosity oil is stronger, obviously.
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