Blackstone Labs is one of our Patron sponsors at the Fly-in this year. Since 1985, Blackstone Laboratories has been supplying state-of-the-art oil analysis to aircraft customers all over the world. Their labs spot the problems lurking in an engine before any pilot would notice an issue. For example, they can detect early-onset cylinder damage, spalling from cam lobes, unusual valve or lifter wear, piston scuffing, problems with air filtration, and water contamination. Their reports are written by humans, not A-I, so they always include a comprehensive comment section where their experts explain the results in plain English. Blackstone prices are competitive and their test kits are free: order one today at Blackstone-Labs.com.