Part of me is pondering on something like this:
Liquid Cooler Lineup: Intel, Corsair, MainGear Tested - HotHardware
But with longer hoses and heated by basically a glorified candle outside the car. (i don't wan't to burn motor oil inside it)
I was thinking of warming the ventilation air before the defroster heater core, so it shortens engine warm up too.
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2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)