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Old 05-23-2022, 02:42 AM   #7 (permalink)
Ecky
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Join Date: Dec 2011
Location: New Zealand
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ND Miata - '15 Mazda MX-5 Special Package
90 day: 40.51 mpg (US)
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Prius has a coolant thermos that holds a large amount of coolant and keeps it hot from the previous trip.

Block heaters work. I've found that especially in winter, they save money overall, so long as you run them less than 2 hours or so.
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