> 3. remove the mechanical thermostat on the engine, so that it takes longer to get to operating temperature. Modern engines are designed to work at preferred

> 3. remove the mechanical thermostat on the engine, so that it takes longer to get to operating temperature. Modern engines are designed to work at preferred temperature. They have two cooling loops, one small which is constantly cooling cylinders and one big (with radiator) which cools the small one to keep engine at proper temperature, not too high and not too low, by mixing some of small loop coolant with large loop coolant. Point 2 is the best solution.