President Ryan Stark returns to talk to Joe about summer flying and leaded fuel (3:40), company growth and new lab setup (11:50) before answering customer questions about magnetic drain plugs, coolant analysis, flashpoint testing, and how analysts determine an engine's true wear profile (23:50). Last but least, a response to misconceptions about our averages (39:00).

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Host: Joe Adams

Guest: Ryan Stark

Producer: Josh Straley