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Originally Posted by bendmac
Do they make block heaters for a Prius? That'd make the car warm before you ever left the garage...
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Yes, there is a block heater and the engine block has a difficult to reach hole for it. The discussions indicate it saves about 100 ml. However, it doesn't have a thermostat so it needs to be put on a timer circuit.
Others have reported some help from an air-shield and
I tried it too. I found it shortened the warm-up time from ~1.2 miles to ~0.7 miles. It also seems to reduce air drag but I don't have any numbers on that effect. I plan to take the front bumper off and see if an automated mechanism can be used that is temperature controlled.
Bob Wilson