[jmatta]

If I'm not mistaken, the factory t-stat starts to open at 186* and is not fully open until 205*...the low temp stat opens at 160* and is fully open at the same temp the factory unit begins to open.

Between 186* and 205*, the factory unit restricts flow, artificially keeping temps higher. Only data logging can provide evidence the lower temps help the engine, but I'm always open to ideas (especially inexpensive ones) to promote longevity in my engine.