Some aviation oil filters fall short of efficiency standards, but still protect engines-barely. Understand what yours really does. The post Oil Filter Testing appeared first on KITPLANES.

We ran our tap water through all the top water filters. Here are the best pitchers to clean your drinking supply. If you're drinking unfiltered tap water, there's a good chance it's tainted with ...

Editor’s note: In this Design Idea (DI), contributor Bonicatto designs a digital filter system (DFS). This is a benchtop filtering system that can apply various filter types to an incoming signal. The ...