We all know motor oil is a lubricant, but did you know that it also functions as a "gasket" to help your piston rings seal?

In this deep dive into cylinder bore surface finish, "Dyno" Don MacAskill and Dr. Mark Malburg review the experimental hone created by Brad Lagman at QMP Racing. If you are into engine technology, this is 20 minutes that you won't regret as Dr. Malburg explains how a profilometer works and how to interpret the results.

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