Basically, when using this alternative waterless coolant, one could install a higher temperature coolant thermostat and increase the temperature at which the fan turns on. Doing so should indeed yield an interesting increase in fuel economy as per their tests.
From their FAQs (
FAQ's » Engine Cooling Systems)
Quote:
34. Can higher temperature coolant thermostats be used with Evans Waterless Heavy Duty Cooling for additional gains in fuel economy?
Yes. SAE Type II testing was performed by the PAVE Research Institute at Auburn University that proved a 3 percent improvement in fuel economy with Evans waterless coolant and 215°F thermostats.
35. Are there additional requirements for using 215°F thermostats?
The fan-off temperature must be increased so that the coolant does not have to be cooler than 215°F for fan-off. Contact Evans Cooling Systems, Inc. for further information.
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Very interesting !