Originally Posted By: kschachn
There's no way to determine if an oil sheared via a Blackstone analysis. Yes the viscosity changed but as has been noted that can be/is due to the presence of low-viscosity fuel in the sample.
I disagree somewhat with this comment. If viscosity is lower than normal, but Flashpoint is normal, or higher than normal, wouldn't that indicate there's little or no fuel dilution and therefore the reduction in viscosity is likely due to shearing? What am I missing?