you always want a thermostat on these and any car really, its not a good idea to take them out as the valve temp is cooled far too much, its not always a good idea to keep oil and coolant as cold as possible, more wear on every engine componant. As oil warms up the viscosity changes a rediculous amount and coolant running cold for longer will only make the cold idle run for much longer using more fuel to warm it up..... low temp thermostats will not lower the overall temp of coolant only take longer to get to that temp of 96 degrees or whatever running temp is