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Old 03-26-2008, 01:48 PM   #1 (permalink)
Daox
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Join Date: Dec 2007
Location: Germantown, WI
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CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
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Swapping in a higher temp thermostat

So, the Paseo look like it needs a new thermostat. I went online and browsed over the selection I have. It seems the stock thermostat is set to 180°F (82°C). Now, I've heard of guys using higher temp thermostats and getting better mileage. So, I continued digging and found I can get a 192°F (89°C) thermostat for the car. Hurray. Now, why does this help? What does it hurt? OEMs must not use 192°F stock for a reason. I'm thinking it probably hurts power output as ignition timing may need to be retarded due to insufficient cooling and hotspot developing. I'm not sure why hotter would be better except that you loose less energy through your coolant system.

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