Interesting that 3.7 V6 Ford Cyclone in my Roadster, ironically also part of the Duratec family, uses a plain mechanical thermostat as with other applications it was designed for, Mustang etc. as cutaway below.

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On my car 98°C is held under all conditions with rare exception of rolling road dyno when it peaked 10 - 15°C higher.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone