Thread: ('11-'14) FB20 Oil Analysis Thread
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Old 07-24-2012, 10:34 AM   #33
finklejag
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Member#: 318622
Join Date: Apr 2012
Location: Portland, OR
Vehicle:
2012 Impreza

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Most 0W-20 oils on the market have a starting Viscosity @100c between 8.0-8.7. The Amsoil OE 0W-20 has a starting viscosity 8.3.

With his oil having a Viscosity of 6.88 at the end of the oil change interval. It sheared down a little. It's still a 20 weight oil though. Most 5W-30's shear down to a 20 weight after a long oil change interval. But 5W-20's usually stay pretty much where they start. The car is breaking in, so that's why the Viscosity is where it's at.
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